Stage 3.5 CNC for 06+ TC w/MCR

The Zipper’s Performance Stage 3.5 heads with Manual Compression Releases have a special high flow port design that is one of the largest we can machine into an O.E castings. Special O.S. 2.00” valves, Step Lock Guides, special valve seat machining, 5/16” dual spring for lift up to .675”. These are maximum output heads and are a good option Vs purchasing CVO castings with the added expense of porting. Combustion chambers are 92 cc.

*Not available for Twin Cooled Models

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.

Click here for Zipper’s Job Order Sheet

Weight 27 lbs
Dimensions 1 × 1 × 1 in
Engine Type

You may also like...