110" Sidewinder Big Bore Kit for 2007-'17 HD® Big Twin Models - Silver SUPER BRIGHT HALO RINGS All of these parts are

All of these parts are pre-drilled

these fender spacers are CNC cut from solid billet 6061 T-6 Aluminum

Machined with the S&S® 4" cylinder stud pattern

This fender uses Bad Dad's Summit Fender as a base and then features a pair of completely flush mounted LED taillights

Dual Piston Seals for leak proof operation

110" Sidewinder Big Bore Kit for 2007-'17 HD® Big Twin Models - Silver SUPER BRIGHT HALO RINGS All of these parts areInspired 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 Low friction Ductile