S&S

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

The proven performance of an S&S cam chest kit without thecams, allowing you freedom of choice in cam profiles Kit oil pump and cam plate are ...

Let that CVO breathe! The S&S Stealth system is now available for 2023-2024 CVO models, and it comes paired with our Lava Chrome teardrop to ma...

The crew here at S&S Cycle have been working on our new Billet Head Breathers, crafted from premium 6061 aluminum and anodized in the iconic S&...

Introducing the next evolution in performance for your primary drive: the S&S Cycle Heavy Duty Compensator Ramp for Harley-Davidson® M8 models!...

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...

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...