Log in / Sign in
Login
Register
Touring®
Zipper’s Milwaukee-Eight® Big Bore Cylinder Kits for 2024 + Gen 2 “Helix” Engines
$0.00
Increasing the size of a Milwaukee-Eight® engine is easy with Zipper’s Big Bore Cylinder Kits. These Big Bore kits are designed for the new Gen 2 M8 engines, which have oval port heads and center cooling.
The Milwaukee-Eight® engines design is made for displacement increases and Zippers offers cylinder kits for Factory stock 4-valve head, SE heads and many Custom High Flow Heads to provide huge torque and horsepower gains.
Each of this specific bore sizes are designed to fit on the factory engine base without case boring just like like-stock installation.
4.250- 4.280 Bores
Zipper’s offers new alloy castings with bore sizes from 4.250 to 4.280
These castings are designed with additional aluminum for added strength vs a O.E. casting with a larger bore liner with the following features:
• Cast Aluminum has 1 lb. additional material for Strength and Reliability
• Stress Relieved Iron Liners
• Precision Sized on Sunnen SV-30 by Zipper’s skilled craftsman
• Special Ring Packs for Advanced Cylinder Sealing
• Gasket Surface Finish Improved for Superior Seal using Cometic MLS Gaskets
• Zipper’s Forged “Spec Built” Pistons manufactured by CP
We have many dome configurations to choose from so you can target various compression ratios. Contact Zipper's support if you have a special requirement.
4.250 x 4.500 stroke = 128ci
Kits include precision fitted cylinders with tight tolerances, 2618 forged pistons with advanced ring packs, pins & clips, head and base gaskets and new head bolts. The rings custom sized to each cylinder.
View Details
Not legal for sale or use in California on any pollution controlled motor vehicle. Not legal for sale or use on any EPA pollution controlled motor vehicle.
***To ensure you enjoy a premium experience with a Zipper's Cylinder Kit, Please fill out a Job Order Sheet prior to completing an order on the website. Click here for Zipper's Job Order SheetPlease choose your application below then select the radio button next to the item to purchase, then add to cart
Scout/Octane Chain Drive Transmission Sprocket
$0.00
Converting your Indian Scout or Victory Octane to chain drive? This 22 tooth transmission sprocket will make the conversion easy. For 530 chain.
View Details
#309-588 ThunderMax® With Wave Tune For 2017-2020* Milwaukee-Eight® Touring Models
$1,088.95
ThunderMax® is complete system designed specifically for EFI equipped Harley Davidson® motorcycles.
This highly advanced, stand-alone tuning system utilizes proprietary AutoTune technology specifically designed to interface with wide-band oxygen sensors to correct abnormal A/F readings over a wide range of throttle positions and RPM ranges to prevent over rich or lean conditions.
ThunderMax® is made in the USA by Thunder-Heart Performance Corp in White House, TN.
*Supports RDRS function on 2019-2020 models.
Select Options
Not legal for sale or use in California on any pollution controlled motor vehicle. Not legal for sale or use on any EPA pollution controlled motor vehicle.
#309-589 ThunderMax® With Wave Tune For 2018-2020* Milwaukee-Eight® Softail® Models
$1,088.95
ThunderMax® is an industry award winning, performance ECM designed specifically for EFI equipped Harley Davidson® motorcycles. This highly advanced, stand-alone tuning system utilizes proprietary AutoTune technology specificly designed to interface with wide-band oxygen sensors to automaticly adjust a wide range throttle positions and RPM ranges to deliver unmatched performance and driveability like no other product in the industry. ThunderMax® is made in the USA and comes 100% assembled, ready to install with no wire-cutting or splicing required. Simply replace the factory ECM and oxygen sensors, load a map, and enjoy your new ride! * ThunderMax for 2021 Softail® models is under development.
Select Options
Not legal for sale or use in California on any pollution controlled motor vehicle. Not legal for sale or use on any EPA pollution controlled motor vehicle.
ThunderMax® 50 with AutoTune: Street Legal EFI Performance
$0.00
ARB E.O. #'s D-644, K-001, K-001-1, K-001-2. K-001-3
ThunderMax® 50 is the most powerful, cost effective, EPA-compliant tuning device in the industry! ThunderMax® 50 provides excellent performance while meeting the tough emissions standards of California Air Resources Board. With its intelligent design, ThunderMax® 50 is continually tuning the engine, adjusting all points of the base map to meet the Air/Fuel targets. Wide-Band sensors provide feedback to the ThunderMax® AutoTune module for automatic AFR adjustments. This proven system provides excellent performance under any riding conditions. ThunderMax® 50 is the one that WORKS!
View Details
ThunderMax® With Wave Tune For 2014-2016 Throttle-By-Wire Touring Models
$1,088.95
ThunderMax® is an industry award winning, performance ECM designed specifically for EFI equipped Harley Davidson® motorcycles. This highly advanced, stand-alone tuning system utilizes proprietary AutoTune technology specificly designed to interface with wide-band oxygen sensors to automaticly adjust a wide range throttle positions and RPM ranges to deliver unmatched performance and driveability like no other product in the industry. ThunderMax® is made in the USA and comes 100% assembled, ready to install with no wire-cutting or splicing required. Simply replace the factory ECM and oxygen sensors, load a map, and enjoy your new ride!
View Details
Not legal for sale or use in California on any pollution controlled motor vehicle. Not legal for sale or use on any EPA pollution controlled motor vehicle.
ThunderMax® With AutoTune For 2008-2013 Throttle-By-Wire Touring Models
$1,088.95
ThunderMax® is an industry award winning, performance ECM designed specifically for EFI equipped Harley Davidson® motorcycles. This highly advanced, stand-alone tuning system utilizes proprietary AutoTune technology specificly designed to interface with wide-band oxygen sensors to automaticly adjust a wide range throttle positions and RPM ranges to deliver unmatched performance and driveability like no other product in the industry. ThunderMax® is made in the USA and comes 100% assembled, ready to install with no wire-cutting or splicing required. Simply replace the factory ECM and oxygen sensors, load a map, and enjoy your new ride!
Not legal for sale or use in California on any pollution controlled motor vehicle.
Not legal for sale or use on any EPA pollution controlled motor vehicle.
Select Options
ThunderMax® With AutoTune For 2002-2007 Touring Models
ThunderMax® is an industry award winning, performance ECM designed specifically for EFI equipped Harley Davidson® motorcycles. This highly advanced, stand-alone tuning system utilizes proprietary AutoTune technology specificly designed to interface with wide-band oxygen sensors to automaticly adjust a wide range throttle positions and RPM ranges to deliver unmatched performance and driveability like no other product in the industry. ThunderMax® is made in the USA and comes 100% assembled, ready to install with no wire-cutting or splicing required. Simply replace the factory ECM and oxygen sensors, load a map, and enjoy your new ride!
Select Options
Not legal for sale or use in California on any pollution controlled motor vehicle. Not legal for sale or use on any EPA pollution controlled motor vehicle.
Zipper’s Milwaukee-Eight® Big Bore Cylinder Kits
$0.00
Increasing the size of a Milwaukee-Eight® engine is easy with Zipper’s Big Bore Cylinder Kits.
The Milwaukee-Eight® engines design is made for displacement increases and Zippers offers cylinder kits for Factory stock 4-valve head, SE heads and many Custom High Flow Heads to provide huge torque and horsepower gains.
Each of this specific bore sizes are designed to fit on the factory engine base without case boring just like like-stock installation.
4.250- 4.280 Bores
Zipper’s offers new alloy castings with bore sizes from 4.250 to 4.280
These castings are designed with additional aluminum for added strength vs a O.E. casting with a larger bore liner with the following features:
• Cast Aluminum has 1 lb. additional material for Strength and Reliability
• Stress Relieved Iron Liners
• Precision Sized on Sunnen SV-30 by Zipper’s skilled craftsman
• Special Ring Packs for Advanced Cylinder Sealing
• Gasket Surface Finish Improved for Superior Seal using Cometic MLS Gaskets
• Zipper’s Forged “Spec Built” Pistons manufactured by CP
We have many dome configurations to choose from so you can target various compression ratios. Contact Zipper's support if you have a special requirement.
4.250 x 4.375 stroke = 124ci
4.250 x 4.500 stroke = 128ci
Kits include precision fitted cylinders with tight tolerances, 2618 forged pistons with advanced ring packs, pins & clips, head and base gaskets and new head bolts. The rings custom sized to each cylinder.
View Details
Not legal for sale or use in California on any pollution controlled motor vehicle. Not legal for sale or use on any EPA pollution controlled motor vehicle.
***To ensure you enjoy a premium experience with a Zipper's Cylinder Kit, Please fill out a Job Order Sheet prior to completing an order on the website. Click here for Zipper's Job Order SheetPlease choose your application below then select the radio button next to the item to purchase, then add to cart
ThunderMax® Zip Kit for SE® 120R Engines
$0.00
Got your eye on a Screamin’ Eagle® or 120R H-D® engine? Zipper's ZIP KITS powered by ThunderMax® are the quick and easy way to simplify installation and power tuning on an EFI equipped big engine!
In compliance with ARB emissions laws, this product is not sold or shipped to California.
View Details
D&D 2-into-1 Billet Cat Exhaust for 2017 M8 Touring Models
$0.00
The D&D Fat Cat 2-into-1 Billet Cat for 2017 M8 Touring Models.
Many Exhaust Systems listed on these pages maybe designed for competition Race Use Only. If you are unsure, please contact a Zipper’s Representative prior to purchasing on the website.
View Details
Not legal for sale or use in California on any pollution controlled motor vehicle. Not legal for sale or use on any EPA pollution controlled motor vehicle.
Please choose your application below then select the radio button next to the item to purchase, then add to cart
KHROME WERKS M8 2-INTO-2 HIGH PERFORMANCE EXHAUST – CHROME
$1,699.95
Give the new Milwaukee Eight an aggressive boost with this three-step 2-into-2 exhaust system. Relentlessly engineered, this system produces significant horsepower and torque gains over stock. Designed to produce the Khrome Werks signature sound with a choice of 4 choices of easy install baffles to suit your needs.
Add to cart
Note: Khrome Werks mufflers with choice a of 4 baffles are sold separately. Mufflers and baffles are needed to complete system.
Many Exhaust Systems listed on these pages maybe designed for competition race use only and not designed or legal for use on a public highway. If you are unsure, please contact a Zipper’s Representative prior to purchasing on the website.Not legal for sale or use in California on any pollution controlled motor vehicle. Not legal for sale or use on any EPA pollution controlled motor vehicle.
KHROME WERKS M8 2-INTO-2 HIGH PERFORMANCE EXHAUST – BLACK
$1,699.95
Give the new Milwaukee Eight an aggressive boost with this three-step 2-into-2 exhaust system. Relentlessly engineered, this system produces significant horsepower and torque gains over stock. Designed to produce the Khrome Werks signature sound without high frequency tones.
Khrome Werks DOMINATOR 2:2 3-STEPPED HEADER, 4.5" MUFFLERS w/Back Cut mufflers
2017+ FLHT, FLHX, FLHR, FLTR TOURING, ECLIPSE
Add to cart
Note: Khrome Werks mufflers with choice a of 4 baffles are sold separately. Mufflers and baffles are needed to complete system.
All Exhaust Systems listed on these pages are designed solely for Competition Race Use Only. Not designed or legal for use on a public highway.Not legal for sale or use in California on any pollution controlled motor vehicle. Not legal for sale or use on any EPA pollution controlled motor vehicle.
KHROME WERKS M8 2-INTO-2 HIGH PERFORMANCE EXHAUST- BLACK ECLIPSE
$1,899.95
Give the new Milwaukee Eight an aggressive boost with this three-step 2-into-2 exhaust system. Relentlessly engineered, this system produces significant horsepower and torque gains over stock. Designed to produce the Khrome Werks signature sound with a choice of 4 choices of easy install baffles to suit your needs.
Khrome Werks DOMINATOR 2:2 3-STEP HEADER, 4.5" MUFFLERS
2017+ FLHT, FLHX, FLHR, FLTR TOURING, BLACK HEADERS.
Add to cart
Note: Khrome Werks mufflers with choice a of 4 baffles are sold separately. Mufflers and baffles are needed to complete system.
All Exhaust Systems listed on these pages are designed solely for Competition Race Use Only. Not designed or legal for use on a public highway.Not legal for sale or use in California on any pollution controlled motor vehicle. Not legal for sale or use on any EPA pollution controlled motor vehicle.
KHROME WERKS M8 4.5″ HIGH PERFORMANCE BILLET TIPPED SLIP-ON MUFFLERS SET 4.5 – CHROME
$789.95
4.50" HP-PLUS CHROME KLASSIC BILLET TIP MUFFLERS FOR 2017+ TOURING
HEADERS:
Add to cart
- 16 gauge 1-3/4- 1-7/8- 2 inch 3 step primaries
- Spherical port caps to insure sealing
- 18mm and 12mm O2 bungs
- Interconnect for increased torque
- Full 2.00” left side cross over for maximum flow
- Dual P-Clamp mounting that allows the system to expand freely
- 4 ½ inch muffler bodies with 2 inch inlets
- Aluminum billet tips with Heat resistant black finish
- High flow absorptive baffle with expansion chamber to maximize torque
- Combination Stainless steel and high temp fiberglass baffle wrap
- Made in the USA
- Removable performance baffle insert for a more aggressive tone.
Not legal for sale or use in California on any pollution controlled motor vehicle. Not legal for sale or use on any EPA pollution controlled motor vehicle.
D&D 2009-2016 Touring XCat 2:2 True X Header System -(IN STOCK)
$799.00
The D&D XCat 2:2 True X system with D&D mufflers for 2009-2016 Harley Touring Bikes has it own distinct sound not like any other D&D system. Performance increases on the X-CAT with D&D Slip-on Mufflers is about 8 to 10 percent depends on the tune on the bike.
D&D exhaust systems are designed around stock chassis configurations. If your motorcycle has modifications such as Lowered Suspension, Shocks, or Aftermarket Saddlebags, these exhaust systems may not work as intended.
Add to cart
Note: Slip-ons are needed to make this product a complete system
All Exhaust Systems listed on these pages are designed solely for Competition Race Use Only. Not designed or legal for use on a public highway.Not legal for sale or use in California on any pollution controlled motor vehicle. Not legal for sale or use on any EPA pollution controlled motor vehicle.
Zipper’s Chain Conversion Kits for Touring Models
$0.00
We’ve taken the hassle of converting your late model belt driven H-D® to chain drive. Whether you’re interested in a different final drive ratio, added driveline strength or more clearance for a wider tire, these kits will make your life easier. Kits are available with durable, high wearing RK Pro O-Ring chains (best for street use) or RK's brutally strong, non-o-ring DR (Drag Race) chain.
*** Due to supply problems, 1985 - 1999 and 2007 and 2008 kits are only available with chrome steel or silver steel rear sprockets!!! The largest rear sprocket available is a 51 tooth***. 2000-2006 kits are only available with chrome steel or black steel rear sprockets.
View Details
Zipper’s Axle & Adjuster Kit for 2009-Up Touring Models
$359.95
Axle & Adjuster Kit for 2009-Up Touring Models - Zipper's NEW axle and adjuster kit for 2009-up Touring models allows precise adjustment and alignment of the rear wheel, replacing the factory cam-type adjusters. This kit is supplied with a chrome-moly axle and severe-duty slider-style chain adjusters, eliminating the hard-to-align cam adjusters. Conveniently, this system bolts-on and does not require modifications to the swing-arm. Contact us today for any additional inquires about this kit.
Add to cart
D&D Boarzilla 2:1 Exhaust for 2007-2008 Touring Models
$0.00
This 2-into-1 exhaust system is designed for large displacement, high output engines. Similar to the Fat Cat system, but has increased capacity for larger engines. The Boarzilla is an excellent choice for engines with performance modifications and plus 25% or larger displacement. The muffler includes a 2-1/2” core perforated baffle. Includes full-length header heat shields to ensure great looks over the long haul. For the traditionalist, a non-functional “Ghost” pipe is available for the left side of touring models to keep the dual exhaust look.
This insert raises low end torque while not sacrificing sound level. It does drop the high end horsepower level slightly on big inch motors (on smaller engines it doesn't affect hp) and changes the tone of the muffler a bit making it sound more like a deeper version of a Rinehart or RC muffler.
All Exhaust Systems listed on these pages are designed solely for Competition Race Use Only.
Not designed or legal for use on a public highway.
View Details
Not legal for sale or use in California on any pollution controlled motor vehicle. Not legal for sale or use on any EPA pollution controlled motor vehicle.
D&D Boarzilla 2:1 Exhaust for 2009-2016 Touring Models
$0.00
This 2-into-1 exhaust system is designed for large displacement, high output engines. Similar to the Fat Cat system, but has increased capacity for larger engines. The Boarzilla is an excellent choice for engines with performance modifications and plus 25% or larger displacement. The muffler includes a 2-1/2” core perforated baffle. Includes full-length header heat shields to ensure great looks over the long haul. For the traditionalist, a non-functional “Ghost” pipe is available for the left side of touring models to keep the dual exhaust look.
This insert raises low end torque while not sacrificing sound level. It does drop the high end horsepower level slightly on big inch motors (on smaller engines it doesn't affect hp) and changes the tone of the muffler a bit making it sound more like a deeper version of a Rinehart or RC muffler.
All Exhaust Systems listed on these pages are designed solely for Competition Race Use Only.
Not designed or legal for use on a public highway.
View Details
Not legal for sale or use in California on any pollution controlled motor vehicle. Not legal for sale or use on any EPA pollution controlled motor vehicle.
D&D Fat Cat Exhaust for 1995-2008 Touring Models
$0.00
The D&D Fat Cat 2-into-1 exhaust system is an excellent choice for engines with performance modifications from stock to plus-25% displacement, delivering a torque curve that is high and wide, with a strong top-end pull. Excellent workmanship inside and out; broad power design really shows up on the dyno. All 1995-2008 Touring model 2-into-1 Fat Cats are equipped with 18mm oxygen sensor bungs.
This insert raises low end torque while not sacrificing sound level. It does drop the high end horsepower level slightly on big inch motors (on smaller engines it doesn't affect hp) and changes the tone of the muffler a bit making it sound more like a deeper version of a Rinehart or RC muffler.
All Exhaust Systems listed on these pages are designed solely for Competition Race Use Only.
Not designed or legal for use on a public highway.
View Details
Not legal for sale or use in California on any pollution controlled motor vehicle. Not legal for sale or use on any EPA pollution controlled motor vehicle.
***Please select the radio button next to item of your choice from the options below, then click add to cart*
D&D Vortex 4″ Slip-On Mufflers for 1995-2016 Touring Models
$0.00
These D&D 'Boss' series four inch diameter mufflers are supplied with all necessary hardware and are designed for factory headpipes or any headpipe that is designed to accept factory mufflers. Style options include back-cut and slant cut, which follows the saddlebag angle. Wrapped, louvered baffle emits a bassy rumble.
This insert raises low end torque while not sacrificing sound level. It does drop the high end horsepower level slightly on big inch motors (on smaller engines it doesn't affect hp) and changes the tone of the muffler a bit making it sound more like a deeper version of a Rinehart or RC muffler.
All Exhaust Systems listed on these pages are designed solely for Competition Race Use Only.
Not designed or legal for use on a public highway.
View Details
Not legal for sale or use in California on any pollution controlled motor vehicle. Not legal for sale or use on any EPA pollution controlled motor vehicle.
IKON Suspension for Indian Scout
$0.00
Upgrade the suspension on your Indian Scout with the high quality IKON adjustable shock absorbers and premium fork springs. For the rear, IKON shocks are fitted with progressively wound springs that soak up small bumps smoothly and get increasingly stiffer as they travel, so you don't experience back-jarring bottoming on bigger road irregularities. To improve control, 4-position rebound damping is adjusted without tools by simply turning a dial located at the top of the shock, and three levels of spring preload is set using the included spanner wrench. In the front, IKON's progressively wound springs replace the spongy factory units for improved ride and control when ridden aggressively. Both are excellent upgrades, and are easy to install.
View Details
Zipper’s Premium MaxFlow Air Cleaner Kits
$0.00
A nice power increase that’s easy to install! Zipper's Premium MaxFlow Air Cleaner Kits
View Details
Not legal for sale or use in California on any pollution controlled motor vehicle. Not legal for sale or use on any EPA pollution controlled motor vehicle.
Please choose your application below then select the radio button next to the item to purchase, then add to cart
Zipper’s Premium HighFlow Air Cleaner Kits
$0.00
A nice power increase that’s easy to install! Zipper's Premium MaxFlow Air Cleaner Kits
View Details
Not legal for sale or use in California on any pollution controlled motor vehicle. Not legal for sale or use on any EPA pollution controlled motor vehicle.
Please choose your application below then select the radio button next to the item to purchase, then add to cart
MaxFlow Stage 1 Air Filter Upgrade Kit for Twin Cam® Style Cover
$0.00
Is your bike already equipped with a factory Stage I performance air cleaner? Zipper's MaxFlow Stage I Upgrade Kit takes about 5 minutes to install - the difference is immediately noticeable!
View Details
Not legal for sale or use in California on any pollution controlled motor vehicle. Not legal for sale or use on any EPA pollution controlled motor vehicle.
Khrome Werks® 3.5″ HP-Plus® Touring Lite Slip-On Mufflers for 1995-2016 Touring Models
$0.00
Khrome Werks® HP-Plus® Touring Lite mufflers feature a less restrictive baffle core than the standard HP-Plus® Touring mufflers; a full length, straight through perforated tube with KW’s HP-Plus® resonator are utilized for improved top end output. The 3-1/2" diameter, one-piece shells hold more packing resulting in a deeper, throatier exhaust note-- Big Look, Big Power, Big Sound. Fits Touring Harleys® equipped with stock or aftermarket “True Dual” head pipes. Utilizes factory mounting hardware and clamps. Sold in pairs and made in USA.
All Exhaust Systems listed on these pages are designed solely for Competition Race Use Only.
Not designed or legal for use on a public highway.
View Details
Not legal for sale or use in California on any pollution controlled motor vehicle. Not legal for sale or use on any EPA pollution controlled motor vehicle.
Khrome Werks® 3″ HP-Plus® Slip-On Mufflers for 1995-2016 Touring Models
$0.00
Completely redesigned in 2010, KW’s 3” HP-Plus® mufflers feature an upgraded baffle design and acoustical wrap materials in the slim and trim 3" diameter housing. Originally fiberglass wrapped, the redesigned baffle is machined wrapped with a laminated muffler packing consisting of a thin layer of stainless steel under high temperature basalt wool. This dual layer packing covers the complete length of the baffle, minimizing muffler body discoloration and absorbing the annoying higher frequencies while delivering an aggressive rumble. New one-piece shell eliminates the possibility of leaks and transition screws loosening or stripping.
All Exhaust Systems listed on these pages are designed solely for Competition Race Use Only.
Not designed or legal for use on a public highway.
View Details
Not legal for sale or use in California on any pollution controlled motor vehicle. Not legal for sale or use on any EPA pollution controlled motor vehicle.
Khrome Werks® 4″ HP-Plus® Touring and Performance Slip-On Mufflers for 1995-2016 Touring Models
$0.00
These unique 4" HP-Plus® mufflers for Touring models from Khrome Werks are designed to produce excellent power while allowing the user control over their "rumble level". All new absorptive type baffles emit a deep, mellow exhaust tone that is adjustable by simply changing an insert held into the baffle by two bolts. The interchangeable baffle inserts delineate the performance or touring noise level options; and the ingenious design of the insert allows you to change the insert in minutes with hand tools (no hammers!).
All Exhaust Systems listed on these pages are designed solely for Competition Race Use Only.
Not designed or legal for use on a public highway.
View Details
Not legal for sale or use in California on any pollution controlled motor vehicle. Not legal for sale or use on any EPA pollution controlled motor vehicle.
Khrome Werks® Cross-Under Power Headers for 1995-2016 Touring Models
$0.00
These great-performing bagger headers are similar to the factory 2009 head pipes in that the left pipe crosses under the swing arm behind the transmission for a true-dual look, but a hidden inter-connect chamber improves low end torque and maximum top end horsepower while providing balanced flow and sound. Front pipe crosses over to the left side and is securely mounted to the transmission oil pan. System is made from 1¾” 16 gauge mandrel bent steel (cross-under pipe is formed obround from 1-7/8” tubing for increased ground clearance without cross-sectional area flow loss). Includes 220º full coverage heat shields, oxygen sensor ports and accepts any slip-on muffler designed for the factory head pipe.
All Exhaust Systems listed on these pages are designed solely for Competition Race Use Only.
Not designed or legal for use on a public highway.
View Details
Not legal for sale or use in California on any pollution controlled motor vehicle. Not legal for sale or use on any EPA pollution controlled motor vehicle.
S&S Air Filter Kits for EFI Models
$0.00
S&S air cleaners for EFI--add the famous classic teardrop air cleaner assembly to your ride. Replacement back plates, covers and filter elements for S&S applications available separately for repairs or maintenance.
View Details
Not legal for sale or use in California on any pollution controlled motor vehicle. Not legal for sale or use on any EPA pollution controlled motor vehicle.
Please choose your application below then select the radio button next to the item to purchase, then add to cart
USA-Made Economy MaxFlow Air Filter Kits for EFI Models
$0.00
Here’s a nice USA-Made power increase that’s easy to install and easy on the budget! Bolt it on and feel the difference!
NEW LOWER PRICE!
View Details
Not legal for sale or use in California on any pollution controlled motor vehicle. Not legal for sale or use on any EPA pollution controlled motor vehicle.
Zipper’s CP Piston Kits For Milwaukee-Eight® Engines
$0.00
Turn your 107" M8 engine into a 117" by simply boring your stock cylinders! No case modifications necessary, the factory 107" can be safely bored from 3.937" to 4.125". These forged pistons are manufactured for us by CP-Carrillo in 3 different compression ratios (flat top compression ratio is 11.2:1 with an unmodified 87.5cc head) and feature 1.5mm compression rings with 3mm oil rings for superior oil control. Piston kits include pistons, rings, wrist pins and circlips. USA made!
View Details
Not legal for sale or use in California on any pollution controlled motor vehicle. Not legal for sale or use on any EPA pollution controlled motor vehicle.
Click here for Zipper's Job Order Sheet
Zipper’s Muscle 107″ Kit for 2007-2017 Twin Cam®
$0.00
Zipper’s Popular Muscle 107” Kit for Twin Cam® 96/103” engines boost torque and horsepower north of 120! The Muscle 107 is a top end and cam kit that gets its displacement boost by increasing the cylinder bore size to 3.937”, while retaining the factory 4-3/8” stroke. Your cylinder tops are decked for trueness and new 10.6:1 forged pistons are precision-fit using the latest Sunnen equipment, while your heads receive Zipper's high-breathing Stage III treatment with CNC porting, new guides, oversize valves and performance springs. Our Red Shift 577 cams are perfectly matched with the heads and piston to provide big torque & HP across the entire RPM range. Red Shift Dual-Piston cam tensioners are included with Pro-Taper pushrods for a stable valve train and EZ-Adjust covers, with all gaskets needed for assembly. Highly recommended option: our 417-498 blueprinted cam chest/oil system upgrade for improved oil delivery, increasing reliability and durability.
This kit is for the aggressive rider that likes to regularly twist the wick and run up front!
This kit uses your factory head and cylinder cores sent in for modification. An exchange may be possible once your cores are cleaned, inspected and qualified for exchange.
*To ensure you enjoy a premium experience, Please fill out a Build Sheet/Job Order Sheet prior to completing an order on the website.
Click here for Zipper's Build Sheet/Job Order Sheet
View Details
Not legal for sale or use in California on any pollution controlled motor vehicle. Not legal for sale or use on any EPA pollution controlled motor vehicle.
Zipper's is here to help, if you have a question(s) please scroll down and fill out the form and hit send. We will review your question(s) and we will be in contact.
Zipper’s Muscle 117″ Kit for 2007-2017 Twin Cam®
$0.00
Zipper’s Muscle 117” Kit for Twin Cam® 96/103” engines increases displacement with new 4-1/8” bore cylinders while retaining the factory 4-3/8” stroke. New cylinders are stress-relived before being fitted with 10.6:1 forged pistons using the latest Sunnen equipment, while your heads receive Zipper's high-breathing Stage III treatment with CNC porting, new guides, oversize valves and performance springs. Our Red Shift 577 cams are perfectly matched with the heads and piston to provide big torque & HP across the entire RPM range. Red Shift Dual-Piston cam tensioners are included with Pro-Taper pushrods for a stable valve train and EZ-Adjust covers, with all the gaskets needed for assembly. Case boring required for 4-1/8” cylinders, Timken® bearing conversion and cam chest/oil system upgrade recommended. Amazing increase in Power and Torque!
This Kit uses your factory head cores sent in for modification. An exchange may be possible once your cores are cleaned, inspected and qualified for exchange.
*To ensure you enjoy a premium experience, Please fill out a Build Sheet/Job Order Sheet prior to completing an order on the website.
Click here for Zipper's Build Sheet/Job Order Sheet
View Details
Not legal for sale or use in California on any pollution controlled motor vehicle. Not legal for sale or use on any EPA pollution controlled motor vehicle.
Zipper's is here to help, if you have a question(s) please scroll down and fill out the form and hit send. We will review your question(s) and we will be in contact.© 2025 Zipper's Performance, Inc. All Rights Reserved.