New Products
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Red Line® 20W50 Synthetic Motorcycle Oil
Red Line® synthetic motor oils use the most stable synthetic lubricant base stocks... -
ThunderJet™ ‘G’ Carburetors for Bigger Engines
2-1/16” Shorty ‘G’ Series Carbs: Modified in 3 stages: G1, G2 and G3 These... -
BUB Seven CAT Mufflers for 2009-Up Touring & Tri Glide® Models
Designed to Meet California Emissions* and be 50-State EPA Sound Requirements** Here’s...
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Red Line® Big Twin Power Packs
Big Twin Power Packs from Red Line® Oil are complete kits for motorcycles... -
MaxFlow Air Filter Kits for EFI Models
Here’s a nice power increase that’s easy to install and easy on the budget!... -
2009-2013 Tri Glide® Zip Kits with Rinehart® Exhaust
Got a new 103” Tri-Glide® and wondering where the power is? It’s there, you...
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Zipper's Muscle 124" Kit for 2007-Up EFI Twin Cams®
Get Big Power All the Way Through the Entire RPM Range! Zipper’s... -
Zipper's Chain Conversion Kits for Touring Models
We’ve taken the hassle of converting your late model belt driven H-D® to... -
Zipper's Red Shift® Cam Kits
Want to stay 96”, or already 103” and just want to change cams? Zipper’s...
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ThunderMax® N.A.D.S. (Nitrous Assist Dry System)
Developed for professional ThunderMax® EFI tuners, ThunderMax® N.A.D.S. (Nitrous... -
2002-Up V-Rod® Zip Kits
While the V-Rod® is the most powerful Harley® ever produced, there’s always... -
ThunderMax® With AutoTune For 2009-2013 Trike Models
Are you a Rider who wants a tuning product you can Set-and-Forget,...
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Fuel Pressure Checking Gauge
Fuel injection systems rely on consistent fuel pressure for proper operation. When... -
Red Shift® Dual Piston Cam Chain Tensioners
The new Red Shift® Dual Piston Cam Chain Tensioners are a must-have for all 2007-up... -
Red Shift® 525 Cams
The new Red Shift® 525 Cams deliver an impressive gain in HP, with a HUGE...
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Red Shift® 527 Cams
New Red Shift® 527 Cams deliver an impressive gain in Torque and Horsepower which... -
Zipper's Hammer 88" Kit for XR1200® Models
Our Proven Hammer 88" Kit is Now Available for Owners of XR1200® Model Sportsters®! This... -
Zipper's Muscle 103" Kit for 2007-Up EFI Twin Cams®
Watch Your Riding Buddies in Your Rear View Mirror with the Zipper’s Muscle...
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Zipper’s Twin Cam® Exchange 96" to 103" Big Bore Cylinders
Zipper’s knows human nature dictates that when we decide what we want, we want... -
Zipper’s Twin Cam® Exchange 88" to 95" Big Bore Cylinders
Zipper’s knows human nature dictates that when we decide what we want, we want... -
Zipper's Stage IV ProMax CNC 2.0” Heads
Our High Output 2.0”Twin Cam© heads are designed for larger displacement, 4...
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2007-2013 Cable-Throttle Softail® Zip Kits with D&D 2-into-1 Exhaust Systems
No new bike responds to intake, exhaust and tuner upgrades like a new Harley®...
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