3-5/8" bore cylinders for with 88" engines and S&S Super Stock® cylinder heads. This kit includes cylinders and pistons. 5.375" cylinder length for 4-1/4" stroke. 9:1 compression ratio. Can be used to increase displacement of stock 80" motors to 88". For 1984–'99 big twins
Natural. . . . .91-7009
Black. . . . 91-7509
Crankcase boring and flywheel balancing is required. Requires S&S Super Stock cylinder heads.
