s&s

The factory oil control valve on all oil cooled M8 engines regulates the amount of oil flowing to the oil cooler/heads. The stock assembly includes...

The 100" Power Package is the ideal combination of performance and savings to transform your Twin Cam HD without breaking the bank. Bump the early...

The 100" Power Package is the ideal combination of performance and savings to transform your Twin Cam HD without breaking the bank. Bump the early...

The 110" Power Package is the ideal combination of performance and savings to transform your Twin Cam HD without breaking the bank. Bump the early...

The 110" Power Package is the ideal combination of performance and savings to transform your Twin Cam HD without breaking the bank. Bump the early...

Big Bore Kit: 107" to 124" Big Bore Kit Winkle Black Finish with Fin Highlighting Bolt-on kit. No case machining required 4.250" bore Forged Pis...

  Big Bore Kit: 107" to 124" Big Bore Kit Winkle Black Finish with Fin Highlighting Bolt-on kit. No case machining required 4.250" bore Forged Pis...

Big Bore Kit: 107" to 124" Big Bore Kit Winkle Black Finish with Fin Highlighting Bolt-on kit. No case machining required 4.250" bore Forged Pist...

Big Bore Kit: 107" to 124" Big Bore Kit Winkle Black Finish with Fin Highlighting Bolt-on kit. No case machining required 4.250" bore Forged Pist...

  Big Bore Kit: 114" to 128" Big Bore Kit Winkle Black Finish with Fin Highlighting Bolt-on kit. No case machining required 4.250" bore Forged Pis...

Big Bore Kit: 114" to 128" Big Bore Kit Winkle Black Finish with Fin Highlighting Bolt-on kit. No case machining required 4.250" bore Forged Pist...

Big Bore Kit: 114" to 128" Big Bore Kit Winkle Black Finish with Fin Highlighting Bolt-on kit. No case machining required 4.250" bore Forged Pist...

Big Bore Kit: 114" to 128" Big Bore Kit Winkle Black Finish with Fin Highlighting Bolt-on kit. No case machining required 4.250" bore Forged Pist...

107" to 129" Big Bore Kit: Available With or Without Fin Highlighting Bolt-On Kit — No Case Machining Required 4.320" Bore Forged Pistons 11.1...

S&S has been building big bore kits since the 60s and has it down to an absolute science. Our latest efforts are aimed at the Milwaukee Eight®...

114/117" to 132" Big Bore Kit: Wrinkle Black or Black Granite Finish Available With or Without Fin Highlighting for Wrinkle Black Bolt-On Ki...

S&S has been building big bore kits since the 60s and has it down to an absolute science. Our latest efforts are aimed at the Milwaukee Eight® ...

Race only 136" engine specs: Cylinder Heads High-flow cylinder heads with premium seats, guides, valves, springs, and seals +1mm oversized intake...

S&S 350G GEAR DRIVE CAMSHAFT KIT- '17+ M8 Models Bolt-in! Compatible with all stock valve train components 350G gear drive cam has stock specs...

S&S 465C CHAIN DRIVE CAMSHAFT KIT- '17+ M8 Models Excellent low to mid range cam! Good choice for two-up riding or touring where low end grunt ...

S&S 465G GEAR DRIVE CAMSHAFT KIT- '17+ M8 Models Excellent low to mid range cam! Good choice for two-up riding or touring where low end grunt i...

S&S 475C CHAIN DRIVE CAMSHAFT KIT- '17+ M8 Models Excellent all around power and torque cam! Good application for riders looking to increase po...

S&S 475G GEAR DRIVE CAMSHAFT KIT- '17+ M8 Models Excellent all around power and torque cam! Good application for riders looking to increase pow...

S&S 350G GEAR DRIVE CAMSHAFT KIT- '17+ M8 Models High lift cam for maximizing peak torque and horsepower! Designed to make higher RPM power in ...