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The RS657 is one of Zipper’s most Popular big lift grinds that dramatically improves torque over competitors cams while sustaining excellent peak power. This cam is widely used in many performance engines.
This cam is so popular that it is standard equipment in select Zipper’s Performance Muscle Kits and is everything you expect from Red Shift Cams® – broad power, great performance with excellent valve train dynamics-control.
Heavy duty Valve Springs are required, yet the RS657 cams can be used as a bolt-in on H-D 120R engines for a dramatic increase in power.
New cam bearings and performance tappets are required.
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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The RS657 is one of Zipper’s most popular big lift grinds that dramatically improves torque over competitors high lift cams while sustaining excellent peak power.
This cam is widely used in many performance engines and is standard equipment in select Zipper’s Performance Muscle Kits. The RS657 is everything you expect from Red Shift Cams® – broad power, great performance with excellent valve train dynamics-control.
Heavy duty Valve Springs are required on most all applications, yet the RS657 cam can be a bolt in to H-D 120R engines for a dramatic increase in power.
Contact Zipper’s for assistance on valve spring options- recommendations.
DOCUMENTS & DOWNLOADS
Red Shift® Cams Catalog
Red Shift® Twin Cam® Cams Fitment Matrix
Red Shift® Cam Twin Cam® Installation Guide
Rogue’s Red Shift® Cam Install Article – Bikernet
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.
Weight | 1 lbs |
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Brand | |
Related Parts | #403-088, #413-940S, #417-450, #417-455, #456-244, #556-595 |
Country of Origin | |
Engine Type |
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classicsnrods –
Im very surprised there is no review for this awesome cam !! I did a performance 107” Zippers kit on my 2001 FXD Super-glide years back. When I say kit that means all the guess work is taken out by Zippers it’s a perfect matched kit with the ultimate performance for your street hot rod. This cam pulled hard through the hole power band and made just over 120 TQ. and HP. I have purchased odds and ends from Zippers through the years and their customer service is excellent and if they didn’t have answers right away they got right back to me. Thank you for your service! Johnny