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  4. S&S 3 5/8" BIG BORE POWER PACKAGE FOR BIG TWIN EVOLUTION

S&S 3 5/8" BIG BORE POWER PACKAGE FOR BIG TWIN EVOLUTION

3 products

Category dedicated to the S&S 3 5/8-inch big bore kit, specifically designed for Big Twin engines with Evolution architecture. This power package includes large-diameter cylinders, pistons, rings, and necessary gaskets to increase engine capacity, significantly improving torque and throttle response.

About this category

Compatible with Harley-Davidson Big Twin models equipped with Evolution (Ev) engines manufactured between 1984 and 1999. Ideal for restoration or performance enhancement projects requiring a complete, manufacturer-tested solution from S&S. Ensures precise installation and perfect fitment to maximise engine power without additional machining in most standard applications.

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