Cylinder Heads - Super Stock® - 89 cc - Silver - Twin Cam

Cylinder Heads - Super Stock® - 89 cc - Silver - Twin Cam

• 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.