CYL.HD.89CC 99-05TC BLK

89 cc Super Stock® Cylinder HeadsHeads are fully assembled with springs and valvesDesigned for '99-'05 engines with stock crankcaseGood for touring bikes and other heavy vehiclesWorks best for motors over 103" or with high-compression pop-up pistonsCombustion chamber provides a slightly higher than stock, but still manageable compression ratio in larger than stock enginesLarge 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 potentialS&S® High performance valve springs allow the installation of camshafts with up to .650" liftIntake ports flow 264 CFM (Cubic Feet per Minute) compared to stock heads at 182 CFMCompatible with stock rocker boxes, exhaust, and intake manifoldsIncludes heads and four long headbolts; and reuse four long OEM headboltsMade in the USAMust use S&S rocker boxes if S&S compression releases are used.