88" 3 5/8" Big Bore Cylinder and Intermediate Compression Piston Kit for 1984-'99 Big Twins with S&S® Super Stock® Heads -Wrinkle Black Finish. Stock cases will need to be bored out to 3 5/8".
Crankcases must be bored to accept the larger 3-5/8" cylinders
Stock flywheel assembly should be rebalanced
The Super Stock® pistons in this kit are not compatible with stock cylinder heads
Shorter Pushrods and Manifold are required
EFI systems must be recalibrated