Zipper’s Muscle 124″ Kit for 2007-2017 CVO Twin Cam® engines

Raise the bar to the top level on your CVO Twin Cam®! Zipper’s CVO Muscle 124 engine kit improves the high-breathing CVO head with Zipper’s CNC porting and oversize valves, while our proprietary +7cc domed pistons raise compression to 10.75:1. A new 4-5/8” crankshaft adds a ¼” more stroke, while new stress-relieved cylinders add an 1/8” more to the bore. Our Red Shift 657 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 and EZ-Adjust covers for a stable valve train, with all the gaskets needed for assembly. Case boring required for 4-1/8” cylinders; Timken® bearing conversion and cam chest/oil system upgrade highly recommended to improve durability and reliability. Make your CVO run even faster than it looks!

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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