CNC Ported Heads offer a cost-effective approach to upgrading the performance of your motorcycle.
- The intake and exhaust ports are meticulously machined for smooth surfaces, improving the flow characteristics of air and fuel in order to provide enhanced performance
- But it doesnt end there, the proven stock valves rest in reshaped valve seats to further improve flow rates
- The combustion chambers have been machined for smooth surfaces and feature a blended radius on the bathtub edge to reduce detonation by eliminating hot spots and promoting improved combustion
- The head gasket surface has been milled to maintain stock combustion chamber volume (59.9cc), which results in stock compression when used with Original Equipment pistons
- Compression can be increased with the installation of Screamin Eagle high-compression pistons
- Heads are assembled with Original Equipment valves and high-performance valve springs that support cams with lift up to .585."
- All EFI models require ECM calibration (priced separately)
- For race application only
Note
Fits Harley-Davidson '07-later XL1200 models (except '98-'03 XL1200S). Requires installation of Perfect Fit Pushrod Kit (-.050) P/N 18424-06.