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.

  • Requires adjustable or cut to fit pushrods
  • Available in chain & gear drive for Early and Late model engines
  • Chain drive- Use Red Shift Cams® Dual Piston Cam Chain Tensioners (#413-901) for improved cam chest component reliability, maximum throttle response and reduced valve train noise.
  • Use 07- Up part number for 2006 FXD engines
  • New cam bearings and performance tappets are required.


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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