Engine
8170 parts
Harley engine parts for Evo, Twin Cam, Milwaukee-Eight and Sportster motors. Jump to cams, big bore kits, heads, gaskets and seals or engine covers. Free US shipping over $100.
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S&S Cycle - 320-0360 - Flywheel - Twin Cam
S&S Cycle
MSRP: $1,744.95$1,695.95S&S Cycle - 320-0360 - Flywheel - Twin CamFeaturesReplacement Flywheel Assemblies for Twin Cam MotorsS&S 3-piece flywheels with integral main shafts are the strongest yet, made from 4140 steel and...MSRP: $1,744.95$1,695.95 -
S&S Cycle - 320-0354 - Flywheel - Twin Cam
S&S Cycle
$1,794.95S&S Cycle - 320-0354 - Flywheel - Twin CamFeaturesReplacement Flywheel Assemblies for Twin Cam MotorsS&S 3-piece flywheels with integral main shafts are the strongest yet, made from 4140 steel and...$1,794.95 -
S&S Cycle - 320-0523 - Flywheel - 4-5/8" - SE120R - Fits 2007-2017 SE 120R motors
S&S Cycle
MSRP: $1,744.95$1,695.95S&S Cycle - 320-0523 - Flywheel - 4-5/8" - SE120RFeaturesS&S 3-piece flywheels with integral main shafts are the strongest yet, made from 4140 steel and feature a larger 1.671" crankpinFlywheel...MSRP: $1,744.95$1,695.95 -
S&S Cycle - 320-0459 - Stroker Flywheel Kit - 106" - Twin Cam
S&S Cycle
MSRP: $1,744.95$1,695.95S&S Cycle - 320-0459 - Stroker Flywheel Kit - 106" - Twin CamFeaturesFeature three-piece assembled flywheels with shaftsDo not require any motor case modification4-1/2" stroke103" stock motors or...MSRP: $1,744.95$1,695.95 -
S&S Cycle - 320-0464 - Flywheel - Twin Cam
S&S Cycle
MSRP: $1,759.95$1,695.95S&S Cycle - 320-0464 - Flywheel - Twin CamFeaturesS&S 3-piece flywheels with integral main shafts are the strongest yet, made from 4140 steel and feature a larger 1.671" crankpinFlywheel assemblies...MSRP: $1,759.95$1,695.95 -
S&S Cycle - 32-2230 - Flywheel Assembly - Big Twin
S&S Cycle
MSRP: $1,748.95$1,595.95S&S Cycle - 32-2230 - Flywheel Assembly - Big TwinFeaturesMade of high-strength forged steel and designed for stock and high-performance custom applicationsSpecial keyed 6 large diameter tapered...MSRP: $1,748.95$1,595.95 -
S&S Cycle - 320-0351 - Flywheel - Stroker - Twin Cam
S&S Cycle
MSRP: $1,759.95$1,695.95S&S Cycle - 320-0351 - Flywheel - Stroker - Twin CamFeaturesS&S 3-piece flywheels with integral main shafts are the strongest yet, made from 4140 steel and feature a larger 1.671" crankpinFlywheel...MSRP: $1,759.95$1,695.95 -
S&S Cycle - 320-0355 - Flywheel - Stroker - Twin Cam
S&S Cycle
$1,794.95S&S Cycle - 320-0355 - Flywheel - Stroker - Twin CamFeaturesS&S 3-piece flywheels with integral main shafts are the strongest yet, made from 4140 steel and feature a larger 1.671" crankpinFlywheel...$1,794.95 -
S&S Cycle - 320-0358 - Flywheel - Stroker - Twin Cam
S&S Cycle
$1,795.95S&S Cycle - 320-0358 - Flywheel - Stroker - Twin CamFeaturesS&S 3-piece flywheels with integral main shafts are the strongest yet, made from 4140 steel and feature a larger 1.671" crankpinFlywheel...$1,795.95 -
S&S Cycle - 320-0396 - Flywheel - Stroker - Twin Cam
S&S Cycle
MSRP: $1,795.95$1,794.95S&S Cycle - 320-0396 - Flywheel - Stroker - Twin CamFeaturesS&S 3-piece flywheels with integral main shafts are the strongest yet, made from 4140 steel and feature a larger 1.671" crankpinFlywheel...MSRP: $1,795.95$1,794.95 -
S&S Cycle - 320-0352 - Flywheel - Stroker - Twin Cam
S&S Cycle
MSRP: $1,795.95$1,695.95S&S Cycle - 320-0352 - Flywheel - Stroker - Twin CamFeaturesS&S 3-piece flywheels with integral main shafts are the strongest yet, made from 4140 steel and feature a larger 1.671" crankpinFlywheel...MSRP: $1,795.95$1,695.95 -
S&S Cycle - 320-0359 - Flywheel Assembly - Twin Cam
S&S Cycle
$1,795.95S&S Cycle - 320-0359 - Flywheel Assembly - Twin CamFeaturesS&S 3-piece flywheels with integral main shafts are the strongest yet, made from 4140 steel and feature a larger 1.671" crankpinFlywheel...$1,795.95 -
S&S Cycle - 320-0402 - Flywheel - Stroker - Twin Cam
S&S Cycle
MSRP: $1,744.95$1,695.95S&S Cycle - 320-0402 - Flywheel - Stroker - Twin CamFeaturesS&S 3-piece flywheels with integral main shafts are the strongest yet, made from 4140 steel and feature a larger 1.671" crankpinFlywheel...MSRP: $1,744.95$1,695.95 -
S&S Cycle - 320-0454 - Stroker Flywheel Kit - 106" - Twin Cam
S&S Cycle
$1,794.95S&S Cycle - 320-0454 - Stroker Flywheel Kit - 106" - Twin CamFeaturesFeature three-piece assembled flywheels with shaftsDo not require any motor case modification4-1/2" stroke103" stock motors or...$1,794.95 -
S&S Cycle - 320-0460 - Stroker Flywheel Kit - 106" - Twin Cam
S&S Cycle
MSRP: $1,713.95$1,695.95S&S Cycle - 320-0460 - Stroker Flywheel Kit - 106" - Twin CamFeaturesFeature three-piece assembled flywheels with shaftsDo not require any motor case modification4-1/2" stroke103" stock motors or...MSRP: $1,713.95$1,695.95 -
S&S Cycle - 320-0403 - Flywheel Assembly - Twin Cam
S&S Cycle
MSRP: $1,713.95$1,695.95S&S Cycle - 320-0403 - Flywheel Assembly - Twin CamFeaturesS&S 3-piece flywheels with integral main shafts are the strongest yet, made from 4140 steel and feature a larger 1.671" crankpinFlywheel...MSRP: $1,713.95$1,695.95 -
S&S Cycle - 34-2103 - Crankpin - Big Twin
S&S Cycle
$163.95S&S Cycle - 34-2103 - Crankpin - Big TwinFeaturesInclude crankpin, nuts and keyMade in the U.S.A.SpecsMa$163.95 -
S&S Cycle - 310-1326 - Crankcase - MK-Series "B" - Black - M8 Softail
S&S Cycle
$2,849.95S&S Cycle - 310-1326 - Crankcase - MK-Series "B" - Black - M8 SoftailFeaturesStock deck heightLarge volume sumpMachined, close-fitting oil scraper (stock is as cast)A solid foundation for building a...$2,849.95 -
S&S Cycle - 32-2239 - Flywheel Assembly - Big Twin
S&S Cycle
MSRP: $1,599.95$1,595.95S&S Cycle - 32-2239 - Flywheel Assembly - Big TwinFeaturesMade of high-strength forged steel and designed for stock and high-performance custom applicationsSpecial keyed 6 large diameter tapered...MSRP: $1,599.95$1,595.95 -
S&S Cycle - 320-0361 - Flywheel - Stroker - Twin Cam
S&S Cycle
MSRP: $1,713.95$1,695.95S&S Cycle - 320-0361 - Flywheel - Stroker - Twin CamFeaturesS&S 3-piece flywheels with integral main shafts are the strongest yet, made from 4140 steel and feature a larger 1.671" crankpinFlywheel...MSRP: $1,713.95$1,695.95 -
S&S Cycle - 33-2004 - Motor Sprocket Shaft Assembly - Big Twin
S&S Cycle
$163.95S&S Cycle - 33-2004 - Motor Sprocket Shaft Assembly - Big TwinFeaturesIncludes tapered shaft, nut and keysFor use with standard diameter bearingMade in the U.S.A.Specs$163.95 -
S&S Cycle - 33-2027 - Pinion Shaft - Big Twin
S&S Cycle
$183.95S&S Cycle - 33-2027 - Pinion Shaft - Big TwinFeaturesFor use with standard bearing diameterMade in the U.S.A.Fitment notes:Fits L'81-'99 Big Twin with OEM flywheels and '84-'99 Evolution Big Twin...$183.95 -
S&S Cycle - 34-2602 - Crankpin - XL
S&S Cycle
$189.95S&S Cycle - 34-2602 - Crankpin - XLFeaturesInclude crankpin, nuts and keyMade in the U.S.A.SpecsProduct$189.95 -
S&S Cycle - 34-2102 - Crankpin - Big Twin
S&S Cycle
$163.95S&S Cycle - 34-2102 - Crankpin - Big TwinFeaturesInclude crankpin, nuts and keyMade in the U.S.A.SpecsPr$163.95 -
S&S Cycle - 310-1170 - Engine Case - MK-Series - Performance Replacement - M8 Touring
S&S Cycle
$2,499.95S&S Cycle - 310-1170 - Engine Case - MK-Series - Performance Replacement - M8 TouringFeaturesStock deck heightLarge volume sumpFits stock touring frameDesigned to accept larger boresAccepts all OEM...$2,499.95 -
S&S Cycle - 31-0047 - Engine Case - +4.000" Bore - Special Application - Evolution Big Twin
S&S Cycle
$1,995.95S&S Cycle - 31-0047 - Engine Case - +4.000" Bore - Special Application - Evolution Big TwinFeaturesDesigned for high performance engines with cylinder bores 4.000\Cam chest is moved outward 0.250" to...$1,995.95 -
Revolution Performance, Llc - RP301-600 - Piston Kit - Flat-Top - For 139" Monster Big Bore Cylinder Kit - 107" M8
Revolution Performance
$783.95Revolution Performance, Llc - RP301-600 - Piston Kit - Flat-Top - For 139" Monster Big Bore Cylinder Kit - 107" M8Featuresrevolution performance logoTop-quality custom-forged piston kits manufactured...$783.95 -
Revolution Performance, Llc - RP301-111W - Piston Kit - Flat-Top - For 124" Monster Big Bore Cylinder Kit - Twin Cam
Revolution Performance
$529.95Revolution Performance, Llc - RP301-111W - Piston Kit - Flat-Top - For 124" Monster Big Bore Cylinder Kit - Twin CamFeaturesrevolution performance logoTop-quality custom-forged piston kits...$529.95 -
Revolution Performance, Llc - RP301-119WD - Piston Kit - Domed - For 117" Monster Big Bore Cylinder Kit - Twin Cam
Revolution Performance
$529.95Revolution Performance, Llc - RP301-119WD - Piston Kit - Domed - For 117" Monster Big Bore Cylinder Kit - Twin CamFeaturesrevolution performance logoTop-quality custom-forged piston kits manufactured...$529.95 -
Revolution Performance, Llc - RP301-119W - Piston Kit - Dished - For 117" Monster Big Bore Cylinder Kit - Twin Cam
Revolution Performance
$529.95Revolution Performance, Llc - RP301-119W - Piston Kit - Dished - For 117" Monster Big Bore Cylinder Kit - Twin CamFeaturesrevolution performance logoTop-quality custom-forged piston kits manufactured...$529.95 -
Revolution Performance, Llc - RP301-116WD - Piston Kit - Domed - For 107" Big Bore Cylinder Kit - Twin Cam
Revolution Performance
$495.95Revolution Performance, Llc - RP301-116WD - Piston Kit - Domed - For 107" Big Bore Cylinder Kit - Twin CamFeaturesrevolution performance logoTop-quality custom-forged piston kits manufactured with...$495.95 -
Revolution Performance, Llc - RP301-116W - Piston Kit - Flat-Top - For 107" Big Bore Cylinder Kit - Twin Cam
Revolution Performance
$495.95Revolution Performance, Llc - RP301-116W - Piston Kit - Flat-Top - For 107" Big Bore Cylinder Kit - Twin CamFeaturesrevolution performance logoTop-quality custom-forged piston kits manufactured with...$495.95 -
Revolution Performance, Llc - RP301-105W - Piston Kit - Flat-Top - For 98" Big Bore Cylinder Kit - Twin Cam
Revolution Performance
$495.95Revolution Performance, Llc - RP301-105W - Piston Kit - Flat-Top - For 98" Big Bore Cylinder Kit - Twin CamFeaturesrevolution performance logoTop-quality custom-forged piston kits manufactured with...$495.95 -
Revolution Performance, Llc - RP301-104W - Piston Kit - Domed - For 98" Big Bore Cylinder Kit - Twin Cam
Revolution Performance
$495.95Revolution Performance, Llc - RP301-104W - Piston Kit - Domed - For 98" Big Bore Cylinder Kit - Twin CamFeaturesrevolution performance logoTop-quality custom-forged piston kits manufactured with...$495.95 -
S&S Cycle - 106-0432 - Piston Kit - For 103" Hot Set Up Kit® - 3.875" - Standard
S&S Cycle
$481.95S&S Cycle - 106-0432 - Piston Kit - For 103" Hot Set Up Kit® - 3.875" - StandardFeaturesPiston kit includes forged pistons (unless noted) rings, wrist pins and clips for a complete motor...$481.95 -
S&S Cycle - 920-0100 - Big Bore Forged Piston Kit - 3.937" Bore - 107" Twin Cam - Standard
S&S Cycle
$514.95S&S Cycle - 920-0100 - Big Bore Forged Piston Kit - 3.937" Bore - 107" Twin Cam - StandardFeaturesPistons are compatible with stock rods with tapered wristpin endsStock cylinders may be bored to...$514.95 -
S&S Cycle - 920-0101 - Big Bore Forged Piston Kit - 3.937" Bore - 98" Twin Cam - Standard
S&S Cycle
MSRP: $524.95$514.95S&S Cycle - 920-0101 - Big Bore Forged Piston Kit - 3.937" Bore - 98" Twin Cam - StandardFeaturesPistons are compatible with stock rods with tapered wristpin endsStock cylinders may be bored to...MSRP: $524.95$514.95 -
S&S Cycle - 106-3690 - Piston Kit - For 106" Big Bore Kit - 3.927" - Standard
S&S Cycle
$514.95S&S Cycle - 106-3690 - Piston Kit - For 106" Big Bore Kit - 3.927" - StandardFeaturesPiston kit includes forged pistons (unless noted) rings, wrist pins and clips for a complete motor replacementMade...$514.95 -
S&S Cycle - 106-3688 - Piston Kit - For 97" Big Bore Kit - 3.927" - Standard
S&S Cycle
$514.95S&S Cycle - 106-3688 - Piston Kit - For 97" Big Bore Kit - 3.927" - StandardFeaturesPiston kit includes forged pistons (unless noted) rings, wrist pins and clips for a complete motor replacementMade...$514.95 -
S&S Cycle - 106-3491A - Piston Kit for Hot Set Up Kits® - Standard
S&S Cycle
$617.95S&S Cycle - 106-3491A - Piston Kit for Hot Set Up Kits® - StandardFeaturesPiston kit includes set of forged pistons, rings, wristpins, and clips for a complete motorWill fit up to a 4-5/8" strokeMade...$617.95
About Engine
Harley Engine Parts for Rebuilds and Performance
From a fresh gasket set to a full big bore build, we stock the Harley engine parts you need to rebuild, maintain or wake up your motor. Match parts to your engine: Evo, Twin Cam, Milwaukee-Eight and Sportster parts don't swap across.
Shop Engine Parts
- Camshafts
- Big bore kits
- Cylinders
- Heads
- Pushrods
- Lifters
- Rockers
- Gaskets & seals
- Oil pumps
- Oil filters
- Motor mounts
- Engine covers
We carry engine parts from S&S Cycle, Drag Specialties, V-Twin Mfg, Alloy Art, HardDrive and Rocker Lockers. Pair your build with an air cleaner and exhaust that let it breathe.
Not Sure It Fits?
Year, model and engine all matter, and plenty of parts look the same but aren't. If you can't tell whether something fits your bike, hit us up with your year and model and we'll check it before you order.