88"  Sidewinder 3-5/8" Big Bore Cylinder Kit for 1979-'84 Big Twins - Gloss Black Finish
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88" Sidewinder 3-5/8" Big Bore Cylinder Kit for 1979-'84 Big Twins - Gloss Black Finish

Item #: 91-9001
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$1,249.95
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Installing this 3-5/8" big bore kit will increase the displacement of stock 80" HD® shovelhead engines to 88" using the stock 4-1/4" flywheels. This may also be used to build an 88" engine in 74" shovelheads if a 4-1/4" stroke flywheel assemble is also installed. The kit includes S&S 3-5/8" bore cylinders, 3-5/8" bore forged pistons with rings and wristpins, S&S stainless steel head bolts, base nuts, head gaskets, base gaskets, exhcaust gaskets, and instructions. Compression is 7.5:1. The cylinders are stock length so stock length pushrods and manifold may be used.

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Crankcases must be bored to accept the larger 3-5/8" cylinders Stock flywheel assembly should be rebalanced