88" 3 5/8" Big Bore Cylinder and Piston Kit for 1984-'99 Big Twins with Stock Heads - Natural Aluminum Finish

88" 3 5/8" Big Bore Cylinder and Piston Kit for 1984-'99 Big Twins with Stock Heads - Natural Aluminum Finish

Item #: 91-7002
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$842.95
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Installing this 3-5/8" big bore kit will increase the displacement of stock 80" HD® Evolution® big twin engines to 88" using the stock 4-1/4" flywheels. The kit includes S&S 3-5/8" bore cylinders, 3-5/8" bore flat topped forged pistons with rings and wristpins, head gaskets, base gaskets, exhcaust gaskets, and instructions. The cylinders are shorter than stock, so shorter pushrods, and shorter manifold will be needed to complete the engine.

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Crankcases must be bored to accept the larger 3-5/8" cylinders Stock flywheel assembly should be rebalanced Shorter Pushrods and Manifold are required EFI systems must be recalibrated