S&S CNC Cyclinder head porting is available for 1999-2016 big twin engines (except Twin-Cooled™ and CVO models) • Ideal for 88" - 124" engines • CNC machined ports for a consistent performance increase from stock heads • Great throttle response, high velocity port without losing low RPM torque • Assembled with performance valves and springs ready to bolt-on • Choice of .585" or .650" lift valve springs • Combustion chambers are available in the following volumes: • 83cc-Generally used for stock 88" up to 106" engine displacements • 85cc- Same as stock Twin Cam 88® and 96™ engine displacements • 87cc- Recommended for up to 117" engine displacements • 90cc- Generally used for 124" and up engine displacements • Available in factory black or silver • Send your stock heads to S&S • Get the same set of heads back with CNC machined ports • The best option for heads with a special cosmetic treatment • Allow 1 week turn-around (does not include shipping)
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.
must use Screamin’ Eagle® high flow injectors, HD
#27796-08, with kits over 107”
CNC porting service is considered a special order and is available through S&S Dealers only.