S&S Cycle

Upgrade Your Ride with S&S Cycle's Billet Fuel Rails! Say goodbye to cracked plastic OEM rails and hello to durability and performance like never before. Our Billet Fuel Rails are the ultimate solution for riders seeking reliability and enhanced fuel delivery. Crafted from premium-grade...

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&S Blue. Our new breathers feature a dual O-ring design, ensuring a superior seal in the head, minimizing leaks,...

Features All parts in each kit are matched to ensure superior quality, fit, finish and performance Oil pump and cam plate are precision-machined from billet aluminum with a blue anodized finish Passage plugs are removable for servicing Independent scavenge sections for the flywheel cavity...

Get the proven performance of the S&S cam chest kit while maintaining the freedom to use any cam you like for your Twin Cam or M8 with this kit! Oil Pump/Cam Plate Precision machined from billet aluminum Passage plugs removable for servicing Independent scavenge...

Complete 110" Big Bore and Cam Chest Kits!  Upgrade to the biggest bolt-in performance kit S&S makes for 1999-2017 Harley-Davidson® big twins (except 2006 Dyna® models and 2017 touring models). Get everything you need in one package. Contains an S&S 4” big bore cylinder...

Heat Treated 8640 Steel 200,000 psi Ultimate Tensile Strength 14% increases in strength over stock Stronger material than stock Head bolts Durable Black Oxide Coating 9/16" 12 point head with integral washer Formed threads Cold Formed Head Reusable

Complete 124" and 128" Big Bore and Cam Chest Kits! The S&S Power Package is the ideal combination of performance and savings, designed to transform your M8 without breaking the bank. For the latest generation HD’s, S&S is packaging their brand new 124” &...

Complete 124" and 128" Big Bore and Cam Chest Kits! The S&S Power Package is the ideal combination of performance and savings, designed to transform your M8 without breaking the bank. For the latest generation HD’s, S&S is packaging their brand new 124” &...

S&S Cycle has upped their intake game with a new M8 manifold and leveraged a 5-Axis CNC machining center for the ultimate in consistent shape and flow characteristics. Knowing polished porting has little impact on the intake side, they've machined a uniformly spaced and...

Increased filter area, combined with an air horn like radiused inlet and unique S&S stinger cone to allow smoother faster airflow for more power. Add a stylish, high-performance look with a number of good looking available covers. Kit includes a backplate, filter element, top...

Increased filter area, combined with an air horn like radiused inlet and unique S&S stinger cone to allow smoother faster airflow for more power. Add a stylish, high-performance look with a number of good looking available covers. Kit includes a backplate, filter element, top...

Increased filter area, combined with a radiused inlet and unique S&S stinger allow smoother faster airflow for more power. The S&S Stealth air cleaner backplate is made from the same high-strength, advanced, synthetic polymers used in high-performance automotive intake manifolds and high-end handgun bodies!...

Studs 4140 Chrome Moly studs, oil quenched and tempered to 39-44 HRC Rounded thread roots, rather than flat, improving fatigue strength Positive stop shoulder allows for consistent installed height 180,000 psi tensile strength Reusable 14% increase in strength over stock Heat treated 8640 steel...

Built-in stinger cone directs air smoothly into the bore of the carburetor or EFI throttle body and reduces turbulence and increases flow 85% of original size for perfect proportions; all laid over the easy to install Stealth Air Cleaner system Machined openings around the...

Precision Machined from Billet Aluminum Independent Scavenge Sections for Flywheel Cavity and Cam Chest Debris Screens in both scavenge pickups Magnet in cam chest to help prevent debris from entering pump Increased flow capacity on both feed and scavenge side Adjustable Pressure Relief Valve...

Crafted from strong, billet 6061 T6 aluminium Patent pending dual spray technology for uniform piston cooling Revised spray locations for more effective cooling Anodized in S&S performance blue Shortened nozzle for increased rod clearance Includes all necessary hardware and gaskets

Replace broken or worn OEM pieces with stronger, more durable S&S performance parts Direct replacement for stock parts Hardened and surface ground for ultimate precision and durability

A must for your M8 build! Extend the life of your cylinder heads Prevent damage to Rocker Arm Towers Install studs and safely re-torque nuts Black Oxide Finish 12 pt Nuts

Big lift cams can open up the high rpm potential of the M8 powerplant, but they can also cause their own issues due to the extra stresses and stock valvetrain geometry. Excessive valve thrust and valvetrain wear drove S&S engineers to design stronger, more...