Four-gear set for gear-driven cams; includes two secondary cam gears, outer cam drive and pinion gears, plus mounting hardware. Made in the USA.
Active filters
High-compression long block including Super Stock™ heads, crankcase, high-flow oil pump, cam cover and 640 gear drive cams; oil line kit required. No fuel or ignition systems included.
- Four-gear set with two secondary cam gears and mounting hardware.
- May increase valve train noise; oversized and undersized options available.
- Made in the USA.
- Installer must verify clearances and follow S&S and Harley-Davidson procedures.
Black Edition MK136 engine with 475G camshaft. Made in the USA. For oil-cooled applications; closed-course competition use only.
Machined 6061 billet aluminum cam cover kit with polished or chrome finish and chrome-plated points cover.
Quality construction with exact dimensions ensures a leakproof fit. Sold each; two required per motor.
Complete 132" engine performance kit converts 114"/117" oil-cooled M8 to 132" with big-bore cylinders, performance-matched 550 cam, adjustable relief valve, and serviceable components.
Complete S&S top-end kit with heads, pre-fit forged pistons, and all necessary hardware for quick installation.
- Complete top-end assembly with heads, cylinders, pistons, and gaskets.
- Pistons pre-fit to cylinders for minimal downtime.
- Includes all hardware, clamps, and seals; made in the USA.
- Designed for S&S® T-Series T2 long block engines for Harley Davidson® big twins
- 2.000" intake and 1.605" exhaust valves with S&S® ports
- S&S® high performance valve springs support cam lift up to .650"
- Compatible with stock rocker boxes, exhaust, and intake manifolds
- Requires S&S valve cover gasket kit; not machined for compression releases
Designed for 124" Hot Set Up Kits and '99-'17 Twin Cams; requires crankcase machining.
OEM-style replacement; accepts all OEM connectors and retainers.
OEM-style replacement component that accepts all OEM connectors and retainers for a secure fit.
OEM-style replacement component that accepts all OEM connectors and retainers.
Precision-machined replacement set for stock-style crankcases; sold in pairs; made in the U.S.A.
For S&S® Super Stock® Heads only. Kit includes pistons, rings, wrist pins, and circlips. Made in the USA.
Temporarily reduces crank compression for easier starts, bolt-in kit that increases power from 3200–5700 rpm; includes camshafts and hardware. Installer must verify clearances. Not for models with OEM compression releases.