All Products

T143 long block engines designed to fit in stock chassis with no cutting or frame modifications necessary. Features S&S B3 cylinder heads CNC-machined with two-bolt exhaust flanges, S&S super stock T2 crankcases with reed breather valve three-piece flywheels, S&S TC3 oil pump, and revised-style cam cover. Includes S&S 635 easy-start gear drive...

High-quality OEM-replacement gaskets. Sold in 2-pack.

Precision CNC-machined forged aluminum construction for increased structural strength and dimensional stability. Features separate scavenge sections for flywheel cavity and cam chest, gerotors designed to tolerate pinion shaft runout, magnetic trap in cam chest pickup, and removable passage plugs. Made in the U.S.A.

Uses two laser-cut and highly engineered tubes merged into a single collector, fed by a pair of high-flow air filters directly in the airstream. Bolt-on performance: more than twice the filter area compared to the stock intake system. Boosts horsepower and torque across the rpm range using air column inertia and carefully timed gas dynamic...

Cast iron intake/exhaust guides. Fit S&S Super Stock and stock Harley-Davidson cylinder heads. Guide ID measures approx 0.309"/0.310".

Viton seals for use with 0.562" powdermetal valves. 0.315" x 0.554" OD. Sold in a pack of four.

The most cost effective kit for upgrading your stock clutch without any modifications. Up to 40% more pressure for stronger clutch engagement. Works like a lockup clutch. Fits behind a stock derby cover and primary cover.

Full stainless steel exhaust system with stainless steel heat shields. Oversized stepped header primary tubes for optimal flow and performance. Header length helps M-Eight motor make excellent power. 4" OD diameter stainless steel muffler ends before the rear axle. Computer-aided design and precise header bends for improved ground clearance. Made...

Positive O-ring seal ensures leak-free operation. Can be installed with the stock engine in the frame in most applications. Include die-cast rocker boxes, gaskets and mounting bolts. Assembler must supply rocker shafts and rocker arms for all rocker boxes. Rocker arm supports included. Made in the U.S.A.

Dual Spray technology evenly cools both intake and exhaust sides of pistons. Revised spray locations for more effective cooling. Creates a cooler engine with more power and better durability. Made from billet 6061-T6 aluminum. Anodized in S&S Performance Blue. Includes all necessary hardware and gaskets.

Centrifugal compression release cams designed for easier starting. Available in various grinds optimized for different engine displacements and performance needs.

Improved power and torque with oxygen sensor location same as stock. Uses two high-flow cats to increase exhaust flow while providing optimal back pressure. Relocation of cats to 4.5" mufflers reduces heat on rider. Produces a deep throaty exhaust note. J2825 sound compliant. Made in the U.S.A.

Parts and accessories for S&S heads that accept compression releases. Not for use on OEM heads.

Electronic fuel-injection components for single-bore throttle bodies.

Forged from 8620 steel, heat-treated then shot-peened for additional strength and durability. Rocker arms have 0.75" long bushings instead of the 0.50" long bushings found on most other rocker arms. Feature a modified lubrication system with unrestricted roller oiling. Must be used with adjustable pushrods (sold separately). Recommended that new...

Designed using Finite Element Analysis (FEA) and forged from 8620 steel for strength. Eliminate thrusting on valves for decreased wear on the valve train. Rocker geometry is better suited to high-lift camshafts. Bushings are 50% longer than stock, increasing the time between rebuilds. Oil is sprayed directly on the valve springs, reducing the...

An economical solution for stock rebuilds, and mild performance upgrades. Forged from 8620 steel for greater strength than stock or cast steel. Feature the same 0.750" long rocker shaft bushings as S&S Roller Rockers: longer bushing provides 50% more load bearing area; eliminates the risk of engine damage associated with failed needle bearings....

Performance cam kits offering increased valve timing accuracy. Gear drive kits reverse rear cam direction and eliminate chain lash. Kits include cams, gears, bearings, gaskets, and instructions.

Gear sets required for gear-driven cams that do not come with secondary cam gears. Includes secondary cam gears, outer cam drive gear, outer pinion drive gear, and mounting hardware.

Simple, effective way to enhance the look of your engine. Sold in a set of four.

High-quality, heavy-duty rod set comes complete and ready-to-install. Rods are deep-forged and heat-treated, 0.120" wider than stock in the I-beam section.

Single-fire and dual-fire function built into a single module. All-metal housing provides improved heat dissipation.

Significantly increase performance. Provides more horsepower without sacrificing torque. 10.6:1 compression ratio.

High-flow filter designed especially for Super E and G carburetors. Filter is 1" taller than standard filter and features a low-restriction, pre-oiled filter element. Allows for a 37% increase in airflow. Filter and adapters extend the teardrop housing out 1". Made in the U.S.A.

Made from 52100 bearing material. Include 4340 chromoly axles. Sold in a 4-pack.