S&S Cycle Evolution

Features Stock-height basic engine is direct bolt in replacement for aging 80" H-D Evolution engines Specially machined cylinder heads allow use o...

Features Complete assembled 50 state legal engine for '84-'98 carbureted non-catalyst Big Twins or '70-'99 custom chassis with alternator-style pr...

Features Made of high-strength forged steel and designed for stock and high-performance custom applications Special keyed 6° large diameter tapere...

Features Made of high-strength forged steel and designed for stock and high-performance custom applications Special keyed 6° large diameter tapere...

Features Stock-height basic engine is direct bolt in replacement for aging 80" H-D Evolution engines Specially machined cylinder heads allow use o...

Features Complete assembled 50 state legal engine for '84-'98 carbureted non-catalyst Big Twins or '70-'99 custom chassis with alternator-style pr...

Features Fits in a stock frame just like a stock engine with a little more punch with S&S Super E carburetor, S&S 508 camshaft, and high f...

Features Kit includes standard flywheel assembly, 3.625" Sidewinder® stroker big bore cylinder, 9.75:1 compression ratio pistons, rings and gasket...

Features Kit includes standard flywheel assembly, 3.625" Sidewinder® stroker big bore cylinder, 9.75:1 compression ratio pistons, rings and gasket...

Features For large displacement engines 110" and larger with 10.5:1 to 11.5:1 compression and smaller engines, 96"-107" with 11.0:1 to 12.0:1 comp...

Features S&S Cams are tested on the dyno, street and track before being offered to the public With hundreds of hours of testing on each cam, y...

Features S&S Cams are tested on the dyno, street and track before being offered to the public With hundreds of hours of testing on each cam, y...

Features Features revolutionary design - allows quicker, easier installation without the removal of the rocker covers Threaded adjuster screws int...

Features Rollers have a larger-than-stock inner bearing race that reduces stress and increases axle life Each lifter body and plunger assembly is ...

Features Forged from 8620 steel, heat-treated then shot-peened for additional strength and durability 3/4" long bushings instead of 1/2" long bush...

Features 3.5" stock bore cylinder case for any stroke up to and including 5" and most stock length connecting rods Machined to accept an oil filte...

Features 3.625" big bore cylinder case for any stroke up to and including 5" and most stock length connecting rods Machined to accept an oil filte...

Features 3.5" stock bore cylinder case for any stroke up to and including 5" and most stock length connecting rods Machined to accept an oil filte...

Features Designed for high performance engines with cylinder bores 4.000" Cam chest is moved outward 0.250" to allow crankcases to handle large cy...

Features Made of high-strength forged steel and designed for stock and high-performance custom applications Special keyed 6° large diameter tapere...

Features High-quality tappet roller kit Rollers are made from 52100 bearing material and axles are made from 4340 chromoly Compatible with stock t...

Features S&S heads give great performance, and work with additional upgrades Compatible with stock 3-1/2" or 3-5/8" bore engines Fully assembl...

Features S&S heads give great performance, and work with additional upgrades Compatible with stock 3-1/2" or 3-5/8" bore engines Fully assembl...

Features Fully assembled, and include stainless steel valves and high-lift springs Optimized for smaller displacement engines Available to be used...