EFI
#309-588 ThunderMax® With Wave Tune For 2017-2020* Milwaukee-Eight® 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! *Supports RDRS on 2019-2020 models; Does not work with 2019/2020 Trike Models; ThunderMax for 2021 Touring models is under development.
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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.
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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!
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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.
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ThunderMax® With AutoTune For 2002-2007 Touring Models
$0.00
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!
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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 2001-2016 Softails®
$0.00
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!
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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 2004-2016 Dyna® 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!
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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 2015-2016 Street® 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!
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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 2009-2016 Trike Models
$0.00
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!
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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 2008-2012 XR1200® Sportsters®
$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!
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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 2007-2020 XL Sportsters®
$0.00
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!
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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 2002-2016 V-Rod® 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!
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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® Marelli Conversion Kit with ThunderMax® for 1999-2001 Twin Cams®
$0.00
Stop cussing that early EFI system, just replace it!
Zipper’s has taken the popular ThunderMax® EFI electronics and merged it with a single-throat Delphi®-style throttle body (with the help of some specially made parts) and developed this full conversion kit for bikes with H-D's earliest Magnetti-Marelli EFI systems. This kit allows you to retain the original wiring harness and gas tank, while upgrading to similar components used in the highly durable and reliable Deplhi®-based bikes of 2002-2005.
These kits are built to order with special parts for each application, Please contact a sales representative for lead time.
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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® Marelli Conversion Kit with ThunderMax® for 1995-1998 EV® Models
$0.00
Stop cussing that early EFI system, just replace it!
Zipper’s has taken the popular ThunderMax® EFI electronics and merged it with a single-throat Delphi®-style throttle body (with the help of some specially made parts) and developed this full conversion kit for bikes with H-D's earliest Magnetti-Marelli EFI systems. This kit allows you to retain the original wiring harness and gas tank, while upgrading to similar components used in the highly durable and reliable Deplhi®-based bikes of 2002-2005.
These kits are built to order with special parts for each application.
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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® 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.
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ThunderMax® Zip Kit for JIMS® 120″ and 131″ Engines
$0.00
Got your eye on a JIMS® 120 or 131" 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.
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Zipper’s MUSCLE 124 – STAGE 3 Kit for 2017 and later 107″ Milwaukee-Eight® Models
$0.00
Zipper's MUSCLE 124" - STAGE 3 Kit for the 107" M-8 is the most popular top end and cam kit we've ever produced for a production motorcycle! The big breathing 4-valve heads on the M-8 engine just love displacement, so we've developed this kit for use with our new 4.250" bore drop-on cylinder. These cylinders are fitted with flat-top forged pistons and topped off with Zipper's Stage 3 CNC headwork performed on your cores. Our Red Shift 552 cam delivers HUGE torque as soon as you open the throttle, and carries it across the RPM range to provide instant acceleration from any RPM. Scroll down to read more!
Requires YOUR Head Cores to be shipped to Zippers for CNC Porting and other modifications.
When ordering Zipper’s Engine Kits, Head Cores or Exchange Heads may be available – Start a Build Sheet right away to confirm availability.
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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, 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
Zipper’s MUSCLE 128 – STAGE 3 Kit for 2017 and later 114 & 117″ Milwaukee-Eight® Models
$0.00
Zipper's MUSCLE 128" - STAGE 3 Kit for the 114-117" M-8 is the most powerful top end and cam kit we've ever produced for a production motorcycle! The big breathing 4-valve heads on the M-8 engine just love displacement, so we've developed this kit for use with our new 4.250" bore drop-on cylinder. These cylinders are fitted with flat-top forged pistons and topped off with Zipper's STAGE 3 CNC headwork performed on your cores. Our Red Shift 552 cam delivers HUGE torque as soon as you open the throttle, and carries it across the RPM range to provide instant acceleration from any RPM. Scroll down to read more!
Requires YOUR Head Cores to be shipped to Zippers for CNC Porting and other modifications.
When ordering Zipper’s Engine Kits, Head Cores or Exchange Heads may be available – Start a Build Sheet right away to confirm availability.
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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, 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
Zipper’s MUSCLE 117 – STAGE 3 Kit for 2017 and later 107″ Milwaukee-Eight® Models
$0.00
Our Muscle 117" Kit for the M-8 platform creates phenomenal power in a bolt-on top end and cam kit! We precision-bore and hone your cylinders to accept our +6cc domed pistons and then CNC-port your heads for increased flow and minimize intake to exhaust port differential. Oversize valves and performance valve springs are installed on carefully machined heads that are key to making this big M-8 power. We offer this kit with 2 cam choices, both of which deliver excellent power curves that are sure to satisfy any aggressive rider.
The High Torque kit includes a Red Shift 548 cam - this is what we call the "rowdy" choice. The 548 creates tire-shredding power from just about any part-throttle RPM. Great for rowdy riders wanting instant power that are channeling their hooligan spirit animal! The High Power kit (Red Shift 552) builds power with an extra-strong mid-range and top end pull. This is the one for power junkies who regularly run in higher RPM ranges and want max available power. Both cams have a very lopey sound & feel–no hiding that this is a not stock engine!
These kits include gaskets, tappet cuffs and a set of Quickee pushrods with covers to simplify reassembly. An EFI tuner, performance exhaust, oversize throttle body, injectors-intake will be required to achieve results shown
Requires YOUR Head Cores to be shipped to Zippers for CNC Porting and other modifications.
When ordering Zipper’s Engine Kits, Head Cores or Exchange Heads may be available – Start a Build Sheet right away to confirm availability.
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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, 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
Zipper’s Sleeper 124” Kit for 2017 and later 107″ Milwaukee-Eight Models
$0.00
"Sleep-er" (slang) A vehicle which has been internally modified while retaining a mostly stock appearance in order to fool opponents in a drag race, or to avoid the attention of the police.
This powerful kit by Zipper's transforms your 3.937" bore 107" M8-powered machine to 4.250" bore 124" with a drop-on piston & cylinder kit. The Sleeper 124” kit is based around new-production cylinders and pistons, designed specifically by Zipper’s for durability and improved oil control. The new cylinders are then treated to the best precision boring and honing process you can find, as our technicians precisely measure each piston to provide skilled, old-fashioned sizing processes to the cylinders. Mounted in special torque plates, a CNC-hone is used to create a straight and true finish, topped off with brush-finish technology that requires minimal run time for ring seating while providing best power. Choose the Red Shift cam (468 for Tire-Shredding Early Torque or the 472 for a Sophisticated Balanced Power setup) that will provide the power output that best matches your riding style and we'll package it up with a new full complement cam bearing, top end-cam chest gasket set along with a set of Quickee pushrods and covers to simplify reassembly.
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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, 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
Zipper’s Sleeper 128” Kit for 2017 and later 114” & 117″ Milwaukee-Eight Models
$0.00
"Sleep-er" (slang) A vehicle which has been internally modified while retaining a mostly stock appearance in order to fool opponents in a drag race, or to avoid the attention of the police.
This powerful kit by Zipper's transforms your 114" or 117" M8-powered machine to 4.250" bore 128" with a drop-on piston & cylinder kit. The Sleeper 128” kit is based around new-production cylinders and pistons, designed specifically by Zipper’s for durability and improved oil control. The new cylinders are then treated to the best precision boring and honing process you can find, as our technicians precisely measure each piston to provide skilled, old-fashioned sizing processes to the cylinders. Mounted in special torque plates, a CNC-hone is used to create a straight and true finish, topped off with brush-finish technology that requires minimal run time for ring seating while providing best power. The Red Shift 472 cam (for a Sophisticated Balanced Power setup) is packaged up with a new full complement cam bearing, top end-cam chest gasket set along with a set of Quickee pushrods and covers to simplify reassembly.
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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, 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
Zipper’s Sleeper 117” Kit for 2017 and later 107″ Milwaukee-Eight Models
$0.00
"Sleep-er" (slang) A vehicle which has been internally modified while retaining a mostly stock appearance in order to fool opponents in a drag race, or to avoid the attention of the police.
This powerful kit by Zipper's transforms your 3.937" bore 107" M8-powered machine to 4.125" bore 117" with a simple piston swap in your provided cylinders. We first remove the dowels from the cylinders and machine the head gasket decks to ensure flatness and proper finish for positive MLS head gasket seal. The cylinders are then treated to the best precision boring and honing process you can find, as our technicians precisely measure each piston to provide skilled, old-fashioned sizing processes to the cylinders. Mounted in special torque plates, a CNC-hone is used to create a straight and true finish, topped off with brush-finish technology that requires minimal run time for ring seating while providing best power. Choose the Red Shift cam (468 Early Torque or 472 Balanced Power) that will provide the power output that best matches your riding style and we'll package it up with a new full compliment cam bearing, top end-cam chest gasket set along with a set of Quickee pushrods and covers to simplify reassembly. This is a hugely cost-effective way to increase the power of the Milwaukee-Eight® engine – with stock heads!
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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, 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
ThunderMax® USB/Serial Port Adapter #372-002
$33.95
If your laptop or PC does not have a serial port, this inexpensive adapter will instantly add a serial port to your computer for communicating between ThunderMax® EFI modules and models listed below. Part #372-002
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1995-2005 M.A.T. Sensor Extension Harness
$15.49
This extension harness will allow relocation of the Manifold Air Temperature sensor on ‘95-’05 models to the air cleaner backing plate from behind the throttle plate, where it is susceptible to “heat soaking” from a hot engine.
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1995-2005 Manifold Air Temperature (M.A.T.) Sensor
$44.95
Stock Manifold Air Temperature (M.A.T.) sensor replacement for 1995-2005 injected Harley-Davidson® models.
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2-Bar Map Sensor for Supercharger or Turbo Applications
$171.95
Required when using a ThunderMax® in a boost application.
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2001-2005 Delphi® EFI Wiring Harness Connector Kit
$69.95
Includes connectors and terminal ends for IAC, TPS, MAT and injectors for 2001-2005 components. Allows fitment of 2001-2005 throttle bodies to 2006-up Big Twins with cable-actuated throttle bodies. Wiring instructions included.
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2006-Up Cable-Type Throttle Body Wiring Harness Connector Kit
$49.95
Includes connectors and terminal ends for IAC, TPS, MAT and injectors for 2006-up cable-type throttle body components. Allows fitment of 2006-up cable-actuated throttle bodies to 2001-2005 bikes. Wiring instructions included.
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2006-Up Manifold Air Temperature (M.A.T.) Sensor for Delphi® Injected Cable-Throttle Models
$49.60
2006-Up Manifold Air Temperature (M.A.T.) sensor for Delphi® injected cable-throttle models . Stock replacement, sold each.
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Cylinder Head Temperature Sensor
$51.59
Cylinder Head Temperature Sensor fits 1999-2009 Touring, 2001-2009 Softail®, and 2004-2009 Dyna®. Stock replacement, sold each.
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DTT WEGO AFR Tuning Aids
$0.00
Daytona Twin Tech’s WEGO (Wide-Band Exhaust Gas Oxygen) systems allow the tuner to monitor live and recorded exhaust AFR to assist in fuel tuning.
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Fuel Pressure Regulator
$53.36
Fuel Pressure Regulator fits 2002-2007 Touring, 2001-2007 Softail®, and 2002-2009 V-Rod® models. Stock replacement. Sold each.
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Fuel Rail
$144.08
Fuel Rail fits 2001-2005 Delphi® injected models. Stock replacement, sold each.
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Fuel Rail Kit
$167.25
Fuel Rail Kit fits 2006-up Delphi® injected Big Twin models with cable-actuated throttle body. Stock replacement.
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Fuel Supply Tube
$29.54
Fuel Supply Tube fits 2001-2005 Delphi® injected models. Stock replacement, sold each.
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Fuel Supply Tube Fork
$10.99
Fuel Supply Tube Fork fits 2001-2005 Delphi® injected models. Stock Replacement.
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