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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" 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. +.005" bore.
Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)).
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