S&S Cycle 910-0642 100" Sidewinder Big Bore Kit for 1999-'06 HD® Big Twin Models - Silver Wine Glasses The Harley-Davidson® Black Lightning Darts

The Harley-Davidson® Black Lightning Darts are made of black-coated brass with a double knurled barrel

518" Piston Material: Aluminum Product Name: Piston Riding Style: Street Stroke Length Imperial: 4-1/4" Units: Kit Fitment

durable and fashionable

High performance black oiled cotton air filter

S&S Cycle 910-0642 100" Sidewinder Big Bore Kit for 1999-'06 HD® Big Twin Models - Silver Wine Glasses The Harley-Davidson® Black Lightning DartsS&S Cycle 910 0642 Inspired by our Pro Stock Drag Race engines, these updated big bore kit utilizes a Ductile Cast Iron liner wrapped in cast aluminum for optimum thermal conductivity and performance. Bolt in kits do not require machining, rebalancing or engine removal, and include just about everything youll need to complete the installation. The biggest cylinder bore that can be installed in a stock crankcase without machining! Features & Benefits