NEW PRODUCTS

Features Piston kit includes forged pistons (unless noted) rings, wrist pins and clips for a complete motor replacement Made in the U.S.A Specs ...

Features Piston kit includes forged pistons (unless noted) rings, wrist pins and clips for a complete motor replacement Made in the U.S.A Specs ...

Features Replacement ring sets for S&S pistons only Rings come as sets for two pistons Made in the USA Specs Product Name Piston Rings T...

Features Replacement ring sets for S&S pistons only Rings come as sets for two pistons Made in the USA Specs Product Name Piston Rings T...

Features Replacement ring sets for S&S pistons only Rings come as sets for two pistons Made in the USA Note: Fits pistons for '36-'84 OHV Bi...

Features Complete set of piston rings Made in the U.S.A. Specs Product Name Ring Set Type Piston Bore Size 4.250" Units 2 Pack Riding ...

Features Required for S&S 106" stock bore stroker kit with 4-1/2" stroke flywheels Compatible with stock or S&S Super Stock® cylinder head...

Features New-style breather is not dependent on the rotation of the crankshaft to make it open and close. Instead, reeds open when pressure in the...

Features New-style breather is not dependent on the rotation of the crankshaft to make it open and close. Instead, reeds open when pressure in the...

Features Piston kit includes set of pistons, rings, wristpins, and clip Compression ratios listed are approximate and are calculated using the cor...

Features Piston kit includes set of pistons, rings, wristpins, and clip Compression ratios listed are approximate and are calculated using the cor...

Features For '70-'84 custom chassis with alternator-style primary Natural crankcases and stock-looking silver powder-coated cylinders Has correct ...

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 High compression Special head machining fits stock length intake manifolds (S&S manifold size 410) Revised oil routing on '99-'06 Tou...

Features Super Stock™ heads and crankcase Easy start 585 gear drive cams with redesigned cam cover TC3 oil pump and cam plate Made in the USA Not...

Features Super Stock™ heads and crankcase Easy start 585 gear drive cams with redesigned cam cover TC3 oil pump and cam plate Made in the USA Not...

Features High compression Special head machining fits stock length intake manifolds (S&S manifold size 410) Revised oil routing on '99-'06 Tou...

Features Fits '84-'99 Harley-Davidson® big twin chassis and custom frames designed for Evolution® big twin engines +30% increase in HP and torque ...

Features Saves time because pistons already fit to the cylinders - ready to assemble out of the box Cylinders are constructed from premium aluminu...

Features Saves time because pistons already fit to the cylinders - ready to assemble out of the box Cylinders are constructed from premium aluminu...

Features For non-balanced Twin Cam models Converts a stock engine to 124" using the stock crankcases Include S&S Super Stock® 91 cc cylinder h...

Features For non-balanced Twin Cam models Converts a stock engine to 124" using the stock crankcases Include S&S Super Stock® 91 cc cylinder h...

Features S&S 3-piece flywheels with integral main shafts are the strongest yet, made from 4140 steel and feature a larger 1.671" crankpin Fits...