106-5530 3-7/16" forged stroker piston kit. +.030"

Designed for stroker applications in 1941 to 1984 Big Twins, this S&S forged piston kit features a .030 inch oversize. These pistons are compatible with 1200cc or 1340cc cylinders using stroker flywheels and stock 5.330 inch cylinder lengths. You can expect compression ratios from 8.4:1 up to 10.8:1 depending on whether you are running a 4-1/2, 4-5/8, or 4-3/4 inch stroke. S&S uses an advanced alloy to provide the strength of a forging with the quiet operation of a cast piston. Sold as a set, the kit includes wrist pins, clips, and rings. It is essential that a knowledgeable mechanic verifies all clearances and follows the correct break-in procedure for these high-performance components.