Revolution Performance Bolt-On Big Bore Kit (1250cc. Flat Top) - Bore 3.563in. - 10.5:1 Compression - Silver 201-401W

Revolution aerospace-grade all-aluminum cylinders with nickel-silicon-carbide electroplated bores which means NO SLEEVING; allows larger bore sizes and less friction for more horsepower, lower temps and a longer lifespan. True bolt-on kit that delivers major power with no machine work required. Also includes Wiseco forged pistons with rings (that are specifically designed for optimal compatibility with Revolution Performances cylinders), wrist pins, circlips and high-performance head and base gaskets. Available in four finishes: natural silver, black, black with highlighted fins or granite (matches engines of Screamin Eagle models). Replacement head and base gasket sets available separately. Made in the USA. Replacement pistons and rings sold separately.This item fits the following models: 1996-2003 Harley Davidson XL1200C Sportster 1200 Custom1996-2003 Harley Davidson XL1200S Sportster 1200 Sport1999-2003 Harley Davidson XL883C Sportster 883 Custom2002-2003 Harley Davidson XL883R Sportster 883 Roadster1991-2003 Harley Davidson XLH12001991-2003 Harley Davidson XLH8831991-1995 Harley Davidson XLH883DLX Sportster 883 Deluxe1991-2003 Harley Davidson XLH883HUG Sportster 883 Hugger