89 cc Super Stock® Cylinder Heads

89 cc Super Stock® Cylinder Heads

Heads are fully assembled with springs and valves

Designed for '99-'05 engines with stock crankcase

Good for touring bikes and other heavy vehicles

Works best for motors over 103" or with high-compression pop-up pistons

Combustion chamber provides a slightly higher than stock, but still manageable compression ratio in larger than stock engines

Large 2.000" intake and 1.605" exhaust valves maintain port velocity for good low and midrange response, but supply enough air for slightly larger engines to perform to their full potential

S&S® High performance valve springs allow the installation of camshafts with up to .650" lift

Intake ports flow 264 CFM (Cubic Feet per Minute) compared to stock heads at 182 CFM

Compatible with stock rocker boxes, exhaust, and intake manifolds

Includes heads and four long headbolts; and reuse four long OEM headbolts

Made in the USA

Must use S&S rocker boxes if S&S compression releases are used.