For 89cc/91cc 89cc/91cc heads are found on S&S Twin Cam-style motors and Evolution-style motors and use 2.000in. intake valves and 1.605in. exhaust valves Exhaust made of Inconel alloy, Intake made of chrome stainless Made in the USA Head Diameter - 1.605in. Stem Diameter - .3125 Overall Length - 4.428
*Images in the listing are for reference only. Actual product may vary.
*Tinted shield sold separately for all Full-Face helmets unless otherwise noted.
- Brand: S&S Cycle
- For 89cc/91cc
- 89cc/91cc heads are found on S&S Twin Cam-style motors and Evolution-style motors and use 2.000in. intake valves and 1.605in. exhaust valves
- Exhaust made of Inconel alloy, Intake made of chrome stainless
- Made in the USA
- Head Diameter - 1.605in.
- Stem Diameter - .3125
- Overall Length - 4.428