These forged 3-7/8" big bore pistons convert HD® Twin Cam® 88® and Twin Cam 88B® engines 95", and are compatible with stock or S&S® Super Stock® cylinder heads in. A 5.3cc pop up dome provides a slight compression increase. Piston weight is virtually identical to that of stock pistons in 88" motors, so rebalancing the stock flywheels is not necessary. +.010" bore.
S&S 3 7/8" pistons for 95" kits are machined to such close tolerances that it is not necessary to measure the piston. Additionally, the low friction coating on the piston skirt
makes taking measurements very difficult. Therefore, hone cylinders to nominal diameter +/- 0.0001" for correct clearance.