New products

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®...

The flywheels are the heart of any performance engine and S&S Cycle has been perfecting the art for over six decades. Stronger, more durable, a...

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® ...

S&S cycle now offers high performance engine cases for the Milwaukee-8 engine for FLH/FLT Touring. These heavy duty cases provide the ultimate ...

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...

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...

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 PISTON COOLING JETS (M8 & TWIN CAM) M8 Piston cooling jets Crafted from strong, billet 6061 T6 aluminium Patent pending dual spray tec...

S&S Cycle has upped our intake game with a new M8 manifold and leveraged a 5-Axis CNC machining center for the ultimate in consistent shape and...

S&S OIL FILTERS Canister is slightly smaller in diameter than stock filters to make them easier to remove and install Designed with a direct b...

Factory tappet guides are constructed of plastic and are at risk for allowing the tappets to twist under heavy stress. S&S Tappet Cuffs capture...

S&S CAM CHAIN TENSIONERS (M8 & TWIN CAM) Thicker shoe for longer wear Direct chain oiling Larger piston Tighter tolerance for improved sta...

S&S OIL PUMPS M8 Water cooled model pump features 20% flow increase on supply side and 52% flow increase on scavenge Oil cooled pump feature...

S&S CAM PLATE M8 Precision Machined from Billet Aluminum Blue Anodized Finish Passage Plugs are removeable for Servicing Made in USA Fitment ...

S&S QUICKEE PUSHRODS Kits include four S&S Quickee pushrods, four pushrod covers & gaskets! (Evolution & Shovel head kits do not i...

S&S SIDEWINDER .650" LIFT VALVE SPRINGS For valve lift to .650” with 1.860”/​178 lb. installed height, 376 lb. at max lift High Performance co...

S&S 590C CHAIN DRIVE CAMSHAFT KIT- '17+ M8 Models The 590C cam was designed as an all out Horsepower Cam for 124 and larger engines. Big lift l...

S&S 590G GEAR DRIVE CAMSHAFT KIT- '17+ M8 Models The 590G cam was designed as an all out Horsepower Cam for 124 and larger engines. Big lift le...

S&S INTAKE MANIFOLD SEALS For use with S&S carbureted intake manifolds and flanges only Sold each! (2 required per manifold) Fits '84-'0...

S&S INTAKE MANIFOLD FLANGES For use on S&S manifolds only Fits '84-'06 Big twins (Except '06 Dyna) & '86-'03 Sportsters Seals sold se...

S&S INTAKE MANIFOLD U-RING For use with S&S Spigot style intake manifold Seals the carb spigot (Backside) to the intake manifold Sold Each

S&S CV (SPIGOT) STYLE MANIFOLDS For use with spigot style carburetors 40mm-48mm (Harley CV, Mikuni HSR, etc.) For use with stock or S&S he...

S&S 55MM PERFORMANCE MANIFOLD FOR M8 Engines are all about the flow, more air in and more air out, anything that slows that down, robs horsepow...

S&S V80 ENGINE    Excellent choice for states with someone who wants a cost effective performance engine! Have an old Evo that is cracked or n...