ENGINE AND COMPONENETS

Better low speed output to reduce battery discharge at an idle. Lower operating temperature for longer service life. Improved plugs that will ...

100% brand-new, not refurbished Completely assembled with Cycle Pro® upgrades Carburetor comes with assortment of main and pilot Jets for full cov...

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...

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...

Star Racing M8 PSI valve spring kit 640 lift PSI Valve Springs up to 640 Lift JHE Titanium Retainers exclusive to this new spring design Trend Bil...

FEULING 630 CONVERSION STYLE CAMSHAFTS ('99-'06 TWIN CAM) 630 CAMS - Vicious power gains, wide streetable power band from a high lift profile camsh...

FEULING HYDRAULIC TENSIONERS CONVERSION KITS Kit includes the needed components to upgrade early 99-06 style mechanical spring tensioner cam chain ...

NAMZ Complete Stand Alone M8 EFI System with exclusive, plug-n-play engine management harness, proprietary twist grip assembly & Thundermax ECM...

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...

S&S TOP MOTOR MOUNT FOR T143 ENGINES Specifically made for  '08 & '09-'16 Touring models to install the S&S T143 engine Includes ness...

Allows the installation of T124 Engines in Dyna models due to the engines having external oil lines straight forward and attractive. Allows the in...

S&S V124 engines    Perfect for applications that require great horsepower and torque, but not at the expense of dependability and engine lif...

NAMZ Complete Stand Alone EFI Engine Management System with exclusive, plug-n-play EFI wiring harness, proprietary twist grip assembly & Thunde...

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...

S&S CHAIN DRIVE 550C CAM CHEST KIT 17'-LATER M8 MODELS- CHROME, WATER COOLED High lift cam for maximizing peak torque and horsepower! Designed ...

If motor oil is the lifeblood of an engine, then the oil pump is its heart. If your engine needs a transplant, the new S&S® three stage oil pum...