S&S Cycle 99-06 BT 4-1/8in Bore Cylinder & Piston Kit - Silver

This big bore cylinder and piston kit contains S&S 4-1/8" bore cylinders and forged pistons, rings, wrist pins, head and base gaskets. Pistons are machined with a 10.9cc dish and ar intended for use with stock cylinder heads. The cylinders are machined with the stock bolt pattern and are intended for use in stock crankcases of 1999-'06 big twin engines. Designed for 4-5/8" stroke flywheels, resulting in 124" displacement. Cylinder finish is a durable silver powder coat. For best performance, appropriate camshafts, performance air cleaner, performance exhaust and fuel system tuning are required.

• Crankcases must be bored to accept the larger 4-1/8" bore cylinders

Note for Pistons, Rings, Rotors, Rods and engine internals

Unless otherwise specified, some brands supply brake rotors, pistons, strut mounts, rods and rings separately. In some cases, titles may indicate plural, or 'set' - eg the term “ring set” often refers to the rings for a single piston only. If you’re unsure about what’s included with this product, please contact our team for clarification.

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