Engine
2241 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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Out of stock
V-Twin - 10-1437 - 8-Finned Cam Cover Kit Chrome - Fits 1984-1999 Harley-Davidson FLST, 1986-1999 FXST
V-Twin Mfg
$554.47Bolt-on 8-finned cam cover Kit for Evolution models to give it a Retro-style Panhead look!Kit includes a chrome 8-finned cam cover with bushings installed, cast aluminum cam cover adapter trim and...$554.47 -
Out of stock
V-Twin - 10-1436 - Cam Cover Trim Kit Die Cast - Fits 1984-1999 Harley-Davidson FLST, 1986-1999 FXST
V-Twin Mfg
MSRP: $554.47$453.66Cam cover trim kit features the bolt on retro look in an die cast finish.Kit includes a die cast 8-finned cam cover with bushings installed, cast aluminum cam cover adapter trim and cadmium cam cover...MSRP: $554.47$453.66 -
Out of stock
V-Twin - 10-1435 - 4-Finned Cam Cover Kit Chrome - Fits 1984-1999 Harley-Davidson FXST, FLST, FLT, FXD, 1984-1994 FXR
V-Twin Mfg
$554.47Bolt-on 4-finned cam cover kit for Evolution models to give it a Retro-style Panhead look!Kit includes a chrome forged aluminum 4-finned cam cover with bushings installed, cast aluminum cam cover...$554.47 -
Out of stock
V-Twin - 10-1434 - Smooth Cam Cover Kit Cast - Fits 1984-1999 Harley-Davidson FXST, FLST, FLT, FXD, 1984-1994 FXR
V-Twin Mfg
$523.52Bolt-on cam cover kit for Evolution models to give it the Retro-style 1965 Panhead look.Kit includes a replica cast cam cover flatstide style with bushings installed, cast aluminum cam cover adapter...$523.52 -
Out of stock
V-Twin - 10-1329 - Cam Cover Adapter Trim Cast Aluminum - Fits 1999-2016 Harley-Davidson FLT, FLST, 1999-2017 FXST, FXD
V-Twin Mfg
$400.40Cast aluminum cam cover dress up adapter trim allows use of the early retro-style Panhead cam cover to fit TC-88 models.Mounts to existing nose cone cover. *NOTE: Actual cam cover not included. ...$400.40 -
Out of stock
V-Twin - 10-1328 - Cam Cover Adapter Trim Cast Aluminum - Fits 1986-1999 Harley-Davidson FXR, FLT, FLST, 1985-1999 FXST, 1986-1999 FXD
V-Twin Mfg
$400.40Cast aluminum cam cover dress up adapter trim allows use of the early retro-style Panhead cam cover to fit Evolution models.Mounts to existing nose cone cover. *NOTE: Actual cam cover not included...$400.40 -
Out of stock
V-Twin - 10-0672 - Cam Chest Assembly Kit Evolution - Fits 1987-1989 Harley-Davidson FLST, FXST, FLT, FXR
V-Twin Mfg
$403.66Kit includes Andrews EV13 cam.Includes oil pump snap rings, pinion shaft key, Sifton pinion gear set, Sifton cam chest steel breather, cam chest breather valve washer, .055 cam bearing washer, cam...$403.66 -
Out of stock
V-Twin - 10-0485 - Primary Cam Drive Chain Tensioner - Fits 1999-2006 Harley-Davidson FLST, FXST, FLT, 1999-2005 FXD
V-Twin Mfg
$69.31Primary cam drive chain tensioner for Twin Cam models.This primary cam drive chain tensioner is manufactured to meet OEM specifications for long lasting durability and performance. WARNING: Hold...$69.31 -
Out of stock
V-Twin - 51-0438 - Softail Top Frame Plate - Fits 1986-1999 Harley-Davidson FLST, FXST
V-Twin Mfg
$22.32Softail top frame plate features a raw steel finish, to match with seat area plate on 1986-1999 Softail original frames.For Hardtail installation. *NOTE: Align with the (2) 1/4" holes in plates. ...$22.32 -
Out of stock
Drag Specialties - DS750732 - Piston
Drag Specialties
$123.97Drag Specialties - DS750732 - PistonFeaturesOEM quality cast aluminum alloy constructionSome fitments feature pistons with a coating that extends piston life, reduces friction and allows for cooler...$123.97 -
Out of stock
Drag Specialties - DS750507 - Cylinder - 1340cc - 1984-1999 Big Twin
Drag Specialties
$254.35Drag Specialties - DS750507 - Cylinder - 1340cc - 1984-1999 Big TwinFeaturesReplacement cylinders feature ductile cast-iron sleeves in aluminum castingsSleeve has external ribs that “lock” the sleeve...$254.35 -
Out of stock
Drag Specialties - DS376502 - Rocker Cover Chrome - Evo/Big Twin
Drag Specialties
$351.87Drag Specialties - DS376502 - Rocker Cover Chrome - Evo/Big TwinFeaturesQuality construction with exact dimensions ensures a perfect, leakproof fitAvailable in chromeSold each, two required per...$351.87 -
Out of stock
Drag Specialties - DS330039 - Oil Plug - With Temperature Gauge - 2.87"
Drag Specialties
$41.29Drag Specialties - DS330039 - Oil Plug - With Temperature Gauge - 2.87"FeaturesSensitive to oil temperatures up to 350°FChrome gauge bezelReplacement Part for OEM Number(s):6289600Specs$41.29 -
Out of stock
Drag Specialties - DS193833 - Rocker Arm - Rear Exhaust/Front Intake
Drag Specialties
$83.69Drag Specialties - DS193833 - Rocker Arm - Rear Exhaust/Front IntakeFeaturesOEM style rocker armsReplacement Part for OEM Number(s):1736083,1736083ASpecs$83.69 -
Out of stock
Drag Specialties - DS193800 - Rocker Arm - Rear Exhaust/Front Intake - Shovelhead
Drag Specialties
$55.07Drag Specialties - DS193800 - Rocker Arm - Rear Exhaust/Front Intake - ShovelheadFeaturesOEM style rocker armsReplacement Part for OEM Number(s):1736066ASpecs$55.07 -
Out of stock
Drag Specialties - DS193801 - Rocker Arm - Front Exhaust/Rear Intake - Shovelhead
Drag Specialties
$55.07Drag Specialties - DS193801 - Rocker Arm - Front Exhaust/Rear Intake - ShovelheadFeaturesOEM style rocker armsReplacement Part for OEM Number(s):1737566ASpecs$55.07 -
Out of stock
Drag Specialties - DS190880 - Bolt Set - Motor Mount - Knurled - Dyna/Softail
Drag Specialties
$28.03Drag Specialties - DS190880 - Bolt Set - Motor Mount - Knurled - Dyna/Softail Features Replacement hardware for the motor mount Made in the USA Specs$28.03 -
Out of stock
Drag Specialties - DS190867 - Bolt Kit - Cam Cover - Smooth - Chrome - '70-'84 Harley-Davidson
Drag Specialties
$16.15Drag Specialties - DS190867 - Bolt Kit - Cam Cover - Smooth - Chrome - '70-'84 Harley-DavidsonFeaturesReplacement hardware for cam coverMade in the USASpecs$16.15 -
Out of stock
Drag Specialties - 24020071 - Rocker Box Cover - Twin Cam
Drag Specialties
$31.27Drag Specialties - 24020071 - Rocker Box Cover - Twin CamFeaturesMade in the U.S.A.SpecsBase FinishChrom$31.27 -
Out of stock
Drag Specialties - 19020409 - Head Bolt Covers - Chrome
Drag Specialties
$49.63Drag Specialties - 19020409 - Head Bolt Covers - Chrome Features Comes with setscrews and hex wrench Die-cast aluminum Specs$49.63 -
Out of stock
Drag Specialties - 10120162 - Breather Bolts - Evolution Big Twin - 1/2"-13
Drag Specialties
$24.56Drag Specialties - 10120162 - Breather Bolts - Evolution Big Twin - 1/2"-13FeaturesChrome-plated hex-head breather boltsFits most supports and breather bracketsSpecs<$24.56 -
Out of stock
Drag Specialties - 09401991 - Cam Cover - Chrome - M8
Drag Specialties
$153.65Drag Specialties - 09401991 - Cam Cover - Chrome - M8FeaturesDie-cast aluminum constructionAccepts OEM-style time coversAccepts OEM gasket and mounting hardwareReplacement Part for OEM...$153.65 -
Out of stock
Drag Specialties - 09401875 - Lifter Cover - Chrome - Twin Cam
Drag Specialties
$113.37Drag Specialties - 09401875 - Lifter Cover - Chrome - Twin CamFeaturesMade from die-cast aluminumIncludes gaskets and screwsSold in pairsReplacement Part for OEM Number(s):1796499,1796699Specs$113.37 -
Out of stock
Drag Specialties - 09320304 - High Volume Oil Pump - M8 - without seal
Drag Specialties
$196.05Drag Specialties - 09320304 - High Volume Oil Pump - M8 - without seal Features 126% feed and 131% scavenge volume compared to OEM (stock) M8 fourth generation oil pumps at 1000 rpm 123% feed...$196.05 -
Out of stock
Drag Specialties - 09110041 - Piston Kit - 3.750" Standard - 88" Motor -Twin Cam
Drag Specialties
$157.89Drag Specialties - 09110041 - Piston Kit - 3.750" Standard - 88" Motor -Twin CamFeaturesOEM-quality cast aluminum alloy constructionPiston for Twin Cam motorsIdeal for OEM replacementIncludes two...$157.89 -
Out of stock
Drag Specialties - 09110017 - Piston - Twin Cam
Drag Specialties
$135.63Drag Specialties - 09110017 - Piston - Twin CamFeaturesOEM quality cast aluminum alloy constructionSome fitments feature pistons with a coating that extends piston life, reduces friction and allows...$135.63 -
Out of stock
Drag Specialties - 07110036 - Oil Line Kit - Stainless Steel - Softail
Drag Specialties
$144.11Drag Specialties - 07110036 - Oil Line Kit - Stainless Steel - SoftailFeaturesDirect replacements for OEM oil linesCompression and NPT fittings are chrome-platedMade in the USASpecs$144.11 -
Out of stock
Drag Specialties - 07110035 - Oil Line Kit - Stainless Steel - Softail
Drag Specialties
$198.17Drag Specialties - 07110035 - Oil Line Kit - Stainless Steel - SoftailFeaturesDirect replacements for OEM oil linesCompression and NPT fittings are chrome-platedMade in the USASpecs$198.17 -
Out of stock
Kb Performance - KB425C.020 - Piston Kit - 3.750" +0.020" - 8.8:1 CR - 88" Twin Cam
KB Performance
$283.95Kb Performance - KB425C.020 - Piston Kit - 3.750" +0.020" - 8.8:1 CR - 88" Twin CamFeaturesManufactured from high-strength, T-5 heat-treated, 390 hypereutectic aluminum alloyAllows a tighter fit and...$283.95 -
Out of stock
Kb Performance - KB425C.STD - Piston Kit - 3.750" Standard - 8.8:1 CR - 88" Twin Cam
KB Performance
$287.95Kb Performance - KB425C.STD - Piston Kit - 3.750" Standard - 8.8:1 CR - 88" Twin CamFeaturesManufactured from high-strength, T-5 heat-treated, 390 hypereutectic aluminum alloyAllows a tighter fit and...$287.95 -
Out of stock
Kb Performance - KB425C.005 - Piston Kit - 3.750" +0.005" - 8.8:1 CR - 88" Twin Cam
KB Performance
$287.95Kb Performance - KB425C.005 - Piston Kit - 3.750" +0.005" - 8.8:1 CR - 88" Twin CamFeaturesManufactured from high-strength, T-5 heat-treated, 390 hypereutectic aluminum alloyAllows a tighter fit and...$287.95 -
Out of stock
S&S Cycle - 33-4146 - Pinion Gear
S&S Cycle
$112.95S&S Cycle - 33-4146 - Pinion GearFeaturesHigh-quality pinion gears are carefully machined, heat-treated and then finish groundMade in the U.S.A.Specs$112.95 -
Out of stock
S&S Cycle - 33-4232 - Oil Pump Drive Gear
S&S Cycle
$69.95S&S Cycle - 33-4232 - Oil Pump Drive Gear Features Must be used as a set or with OEM equivalents Made in the U.S.A. Specs$69.95 -
Out of stock
S&S Cycle - 33-4230 - Oil Pump Drive Gear 24 Tooth
S&S Cycle
$50.95S&S Cycle - 33-4230 - Oil Pump Drive Gear 24 ToothFeaturesHardware, check balls, retainers, etc. are available for Big Twin oil pumpsSpecs$50.95 -
Out of stock
Revolution Performance, Llc - RP10193HB027014 - Gasket Kit - 139"/143" - M8
Revolution Performance
$89.95Revolution Performance, Llc - RP10193HB027014 - Gasket Kit - 139"/143" - M8Featuresrevolution performance logoMade in the U.S.A.revolution performance logoSpecs$89.95 -
Out of stock
S&S Cycle - 310-0911 - Cam Cover Gasket - M8
S&S Cycle
$21.95S&S Cycle - 310-0911 - Cam Cover Gasket - M8FeaturesCam cover gasket for M8Replacement Part for OEM Number(s): 25700370Specs$21.95 -
Out of stock
S&S Cycle - 50-7015-12 - Top Rubber Washer
S&S Cycle
$15.95S&S Cycle - 50-7015-12 - Top Rubber WasherFeaturesReplacement rocker box screw sealing washers.SpecsMaterial$15.95 -
Out of stock
S&S Cycle - 106-5723 - Hydraulic Tensioner Block Off Kit - Fits 2017-2025 M-Eight, 2007-2017 Twin Cam and 06 Dyna
S&S Cycle
$16.95S&S Cycle - 106-5723 - Hydraulic Tensioner Block Off Kit Features Block off cover for S&S Complete Gear Drive Cam Chest Kit Specs$16.95 -
Out of stock
S&S Cycle - 330-0626 - Pinion Gear - Undersized - M8
S&S Cycle
$132.95S&S Cycle - 330-0626 - Pinion Gear - Undersized - M8FeaturesA two-gear set is required for gear-driven cams that do not come with secondary cam gears; be sure to select the appropriate outer cam...$132.95 -
Out of stock
S&S Cycle - 33-4249 - Breather Gear Spacing Shim Kit - Big Twin
S&S Cycle
$49.95S&S Cycle - 33-4249 - Breather Gear Spacing Shim Kit - Big TwinFeaturesShim kit includes one of each thickness: 0.100\Made in the USASpecs$49.95
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.