S&S cylinder head replacement valves for 89cc and 91cc combustion chambers.
Fitment:
- Special application 3-1/2" and 3-5/8" bore engines w/ super stock pistons, (76.5 cc chamber)
- 4" and 4-1/8" bore S&S evo engines
- 80 - 124 cu inch S&S evo engines
Specifications
- Intake: 2.000" made of chrome stainless
- Exhaust: 1.605" made of Inconel® alloy