S&S Cycle

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 the tappets without impacting vertical motion and keeping them perfectly aligned, even in high stress, high RPM situations. FEATURES AND...

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...

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...

Product Description S&S Cams offer proven performance for your new M-eight.  Fits: 2017-2023 Harley M8 Engines The 475C is a 100+ HP Bolt-in Cam (When coupled with intake and exhaust) Bolt-in! Compatible with all stock valve train components Kits include all required bearings, o-rings,...

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,...

Introducing the next evolution in performance for your primary drive: the S&S Cycle Heavy Duty Compensator Ramp for Harley-Davidson® M8 models! Built to handle the demands of upgraded horsepower and torque, this Compensator Ramp is engineered with the highest-quality materials and advanced manufacturing techniques....

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 a check ball retainer that is formed steel. Over time, this retainer can fatigue and break, causing chips to...

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...

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...

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...

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

Kit includes four S&S Quickee pushrods, four pushrod covers and O-rings Pushrods are manufactured from chromoly steel for superior strength Pushrod covers have a chrome-plated finish Kit does not require rocker box removal Made in the U.S.A.

The S&S Cycle Precision Tappets are a high performance replacement for both our previous standard and premium lifters for M8, Twin Cams and late Sportster® applications. Each Precision Tappet is hand assembled to exacting tolerances and designed for quiet operation and rapid pump up and...

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...

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

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

Fits 1984-'18 HD® big twin engines, 1986-'19 HD® Sportster® models, and 1994-'02 Buell®. Our forged steel roller rocker arms were designed for superior strength and to eliminate the failure-prone stress areas found in some other rockers. S&S® roller rockers are forged from 8620 steel, heat-treated, and then shot-peened...

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...