Engine
8284 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 - Oil Pump Pressure Valve Stainless Steel fits '82-'91 FXR, '86-'91 FLST, '84-'91 FXST Models
V-Twin Mfg
$92.40V-Twin - Oil Pump Pressure Valve Stainless Steel fits '82-'91 FXR, '86-'91 FLST, '84-'91 FXST Models Machined stainless steel oil pump pressure valve for Big Twins. Fits oil pressure relief valve...$92.40 -
Out of stock
V-Twin - Transmission Motor Support fits '82-'94 FXR Model
V-Twin Mfg
$222.65V-Twin - Transmission Motor Support fits '82-'94 FXR Model Zinc plated transmission motor support features laser cut 1/4" steel with all holes in place. Includes the tab for front exhaust mounts...$222.65 -
Out of stock
Colony - 9701-1 Rocker Feed Line Nipple Parkerized fits '36-'40 EL, '41-'41 FL Models (OEM #33615-36)
V-Twin Mfg
$15.70Colony - 9701-1 Rocker Feed Line Nipple Parkerized fits '36-'40 EL, '41-'41 FL Models (OEM #33615-36) Parkerized rocker feed line nipple. Fitment: EL 1936-1940$15.70 -
Out of stock
Colony - Cylinder Base XLR Type Nut fits '57-'84 Sportster Models
Colony Machine
$35.95Colony - Cylinder Base XLR Type Nut fits '57-'84 Sportster Models Features: For use on specific applications Made in the U.S.A. Fit$35.95 -
Out of stock
Colony - Head Bolt Set fits '86-'91 Sportster Models (OEM #16478-85A, 16480-85A)
Colony Machine
$99.95Colony - Head Bolt Set fits '86-'91 Sportster Models (OEM #16478-85A, 16480-85A) Features: 12-point replacement headbolts Made in the U.S.A.$99.95 -
Out of stock
Colony - Head Bolt Kit fits '57-'72 Sportster Models (OEM #4714W)
Colony Machine
$69.95Colony - Head Bolt Kit fits '57-'72 Sportster Models (OEM #4714W) Features: Hardened to OEM specifications to prevent stretching Made in the U.S.A.$69.95 -
Out of stock
Colony - Rocker End Cap fits '71-'85 Sportster Models
Colony Machine
$36.95Colony - Rocker End Cap fits '71-'85 Sportster Models Features: Individual chrome cap nut and bolt sets for specific applications Made in the U.S.A.$36.95 -
Out of stock
Colony - Hydraulic Pushrods fits '53-'65 Panhead w/ Hydraulic Lifters (OEM #17905-35B)
Colony Machine
$74.95Colony - Hydraulic Pushrods fits '53-'65 Panhead w/ Hydraulic Lifters (OEM #17905-35B) Features: Aircraft-grade aluminum tubing Heat-treated steel tips$74.95 -
Out of stock
Colony - Cylinder Base Stud Set fits '78-'84 Big Twin Models (OEM #16837-78)
Colony Machine
$39.95Colony - Cylinder Base Stud Set fits '78-'84 Big Twin Models (OEM #16837-78) Features: Heat-treated for strength and durability Equal or surpass original equipment$39.95 -
Out of stock
Colony - 8711-8 12-Point Lift Block Screws fits '48-'E77 Big Twin Models (OEM #3750)
Colony Machine
$18.95Colony - 8711-8 12-Point Lift Block Screws fits '48-'E77 Big Twin Models (OEM #3750) Features: Made in the USA Sold in sets of 8$18.95 -
Out of stock
Colony - 8707-6 Oil Pump Plug Kit fits '81-'84 Big Twin Models
Colony Machine
$25.95Colony - 8707-6 Oil Pump Plug Kit fits '81-'84 Big Twin Models Features: Plug and plug kits designed for a variety of Harley-Davidson® oil systems Complete with washers (or O-rings if...$25.95 -
Out of stock
Colony - 11/16"-16 Acorn/Oversized Timing Plug Crankcase/Oil Tank with Special Tap fits '86-'95 Sportster Models
Colony Machine
$51.95Colony - 11/16"-16 Acorn/Oversized Timing Plug Crankcase/Oil Tank with Special Tap fits '86-'95 Sportster Models Features: Timing plugs in a variety of styles and fitments Include kit for...$51.95 -
Out of stock
Colony - Pushrod Tube Cover Conversion Kit fits '91-'03 Sportster Models
Colony Machine
$155.95Colony - Pushrod Tube Cover Conversion Kit fits '91-'03 Sportster Models Features: Complete kit includes four adapter rings, four inner tubes, four bottom tubes, four clips, four spring covers, four...$155.95 -
Out of stock
Colony - 8110-12 Chrome Oil Pump Mounting Hardware fits '36-'67 Big Twin Models (OEM #7035, 27691)
Colony Machine
$6.95Colony - 8110-12 Chrome Oil Pump Mounting Hardware fits '36-'67 Big Twin Models (OEM #7035, 27691) Features: 1/4"-24 hard-to-find hex nuts come in a six-pack OEM style kit is a complete kit$6.95 -
Out of stock
Feuling - 543 Series HP+® Chain Drive Camchest Kit fits '99-'06 Twin Cam Models (Except '06 Dyna Glide)
Feuling
$1,649.95Feuling - 543 Series HP+® Chain Drive Camchest Kit fits '99-'06 Twin Cam Models (Except '06 Dyna Glide) Features: For '99-'06 Twin Cam except for '06 Dyna All necessary components from...$1,649.95 -
Out of stock10% OFF
Arlen Ness - Finned Cam Cover fits '14-'21 Models W/ 111" or 116" Thunder Stroke® Engines
Arlen Ness
MSRP: $199.95Now: $179.96Was: $199.95Arlen Ness - Finned Cam Cover fits '14-'21 Models W/ 111" or 116" Thunder Stroke® Engines The Arlen Ness Finned Cam Cover has a 3D-sculpted design that matches the finned rocker box's on Indian...MSRP: $199.95Now: $179.96Was: $199.95 -
Out of stock
Drag Specialties - Rocker Box Cover fits '66-'84 Shovelhead Models - Chrome
Drag Specialties
$1,004.83Drag Specialties - Rocker Box Cover fits '66-'84 Shovelhead Models - Chrome This cover comes to you in a nice chrome finish. Features Includes both front and rear pieces Fitment$1,004.83 -
Out of stock
Drag Specialties - Oil Pump Assembly Fits '92-'00 Big Twin Models
Drag Specialties
$294.63Drag Specialties - Oil Pump Assembly Fits '92-'00 Big Twin Models This is a high-quality replacement cast aluminum pump body with steel gears and a shaft. Features Raw cast aluminum...$294.63 -
Out of stock
Drag Specialties - Replacement Gerotor Feed for Twin Cam 88” & 96” Applications
Drag Specialties
$28.57Drag Specialties - Replacement Gerotor Feed for Twin Cam 88” & 96” Applications Fitment 2016-2017 Harley-Davidson Low Rider S FXDLS$28.57 -
Out of stock
Feuling - Headbolt Kit fits '17-'22 M8 Models (3.125" Under Head Length)
Feuling
$399.95Feuling - Headbolt Kit fits '17-'22 M8 Models (3.125" Under Head Length) This kit features wide underhead flange bolts and hardened chamfered washers that provide even load distribution for the...$399.95 -
Out of stock
James Gaskets - 65324-83-KCR2 - Copper Crush Ring Exhaust Port Gasket Kit W/ Heavy-Duty Hex Nuts - Fits '84-'21 Evolution Big Twin & '86-'21 Sportster Models (Exc. '21 Sportster S/RH1250S)
James Gaskets
$24.95James Gaskets - 65324-83-KCR2 - Copper Crush Ring Exhaust Port Gasket Kit W/ Heavy-Duty Hex Nuts - Fits '84-'21 Evolution Big Twin & '86-'21 Sportster Models (Exc. '21 Sportster S/RH1250S) Fits:...$24.95 -
Out of stock
S&S Cycle - TC3 Oil Pump & Cam Support Plate Kit - fits '07-'17 Harley Twin Cam
S&S Cycle
$836.95S&S Cycle - TC3 Oil Pump & Cam Support Plate Kit - fits '07-'17 Harley Twin Cam Features: Precision CNC machined forged aluminum Increased stru$836.95 -
Out of stock
S&S Cycle - Silver Powdercoat 89cc Super Stock™ Cylinder Heads fits '06-'17 Twin Cam Models (Exc. Twin Cooled Motors)
S&S Cycle
$1,995.95S&S Cycle - Silver Powdercoat 89cc Super Stock™ Cylinder Heads fits '06-'17 Twin Cam Models (Exc. Twin Cooled Motors) S&S Cycle's 89cc Super Stock™ Cylinder Heads' high port flow creates excellent...$1,995.95 -
Out of stock
Hofmann Designs - H/D Billet Timer Cover - Black fits M8 Model
Hofmann Designs
$65.95Hofmann Designs - H/D Billet Timer Cover - Black fits M8 Model Features: Machined in the USA from 6061 Aluminum Your choice of black anodized or raw Comes with stainless steel...$65.95 -
Out of stock
S&S Cycle - Rocker Arm Stud Kit fits '17-'21 M8 Models
S&S Cycle
$122.95S&S Cycle - Rocker Arm Stud Kit fits '17-'21 M8 Models This rocker arm stud kit lengthens the life of your cylinder heads AND helps prevent damage to the rocker arm towers! You can re-torque the...$122.95 -
Out of stock
Sawicki - Black Heat Shield Kit for Softail Models
Sawicki Exhaust
$150.00Sawicki - Black Heat Shield Kit for Softail Models Features Optional heat shields are sold each$150.00 -
Out of stock
Jagg - Deluxe Diamond Cut Oil Cooler System
Jagg Oil Coolers
$550.99Jagg - Deluxe Diamond Cut Oil Cooler System This special edition oil cooler kit is as spectacular and durable as the gem it is named after. It is the perfect solution for Harleys with perimeter,...$550.99 -
Out of stock
Jagg - Low Mount 10-Row Horizontal Oil Cooler fits '09-'16 Touring Models
Jagg Oil Coolers
$449.95 - $574.95Jagg - Low Mount 10-Row Horizontal Oil Cooler fits '09-'16 Touring Models Jagg's 10-Row Low Mount Oil Cooler System was designed to help Twin Cam engines deliver optimum heat exchange and flow...$449.95 - $574.95 -
Out of stock
Jagg - Low Mount 10-Row Horizontal Oil Cooler fits '84-'08 Touring Models
Jagg Oil Coolers
$449.95 - $574.95Jagg - Low Mount 10-Row Horizontal Oil Cooler fits '84-'08 Touring Models Jagg's 10-Row Low Mount Oil Cooler System was designed to help Twin Cam engines deliver optimum heat exchange and flow...$449.95 - $574.95 -
Out of stock
Jagg - Black Low Mount 6-Row Horizontal Oil Cooler fits '00-'17 Softail Models (Exc. ABS Models)
Jagg Oil Coolers
$399.95Jagg - Black Low Mount 6-Row Horizontal Oil Cooler fits '00-'17 Softail Models (Exc. ABS Models) Jagg's 6-Row Low Mount Oil Cooler Kit was designed exclusively for Twin Cam Harley-Davidson Softail...$399.95 -
Out of stock
S&S Cycle - Chain-Drive Camchest Kits W/ 510C Standard Cams for '99-'06 Twin Cam (Except '06 Dyna)
S&S Cycle
MSRP: $2,060.95$1,924.95S&S Cycle - Chain-Drive Camchest Kits W/ 510C Standard Cams for '99-'06 Twin Cam (Except '06 Dyna) Features Upgrade to S&S bolt-in performance chain-drive or gear-drive camshafts Improves engine...MSRP: $2,060.95$1,924.95 -
Out of stock
Feuling - Race Series® 521 Camchest Kit fits '17-Up M8 Twin-Cooled™ Motors
Feuling
MSRP: $1,979.95$1,895.95Feuling - Race Series® 521 Camchest Kit fits '17-Up M8 Twin-Cooled™ Motors Please note this kit requires high lift valve springs PART #'s 0926-2973 or 0926-2974 (See "Also Bought" Tab)...MSRP: $1,979.95$1,895.95 -
Out of stock
Drag Specialties - DS-209940 - Muffler Support for Harley Sportster '80 to Early '84
Drag Specialties
$106.99Drag Specialties Muffler Support for Harley Sportster '80 to Early '84 Drag Specialties Muffler Support for Harley Sportster '80 to Early '84 replaces Harley-Davidson OEM part number 65599-80A. 1"...$106.99 -
Out of stock
HardDrive - XL 1200 Cylinder - fits Front and Rear
HardDrive
$263.95HardDrive XL 1200 Cylinder Features: Aluminum cylinders with cast iron sleeves All cylinders must be finish honed and matched to pistons Sold each$263.95 -
Out of stock
HardDrive - 74" Shovelhead Cylinder - (Front or Rear)
HardDrive
$185.95The HardDrive 74" Shovelhead Cylinder: Black powder-coated cast iron cylinders All cylinders must be finish honed and matched to pistons Sold each$185.95 -
Out of stock
EMD - XR Trackster Rocker Box Covers -Raw fits '04-'17 XL Models
EMD
$527.99The XR Trackster Rocker Box Covers Make that Evolution Sportster look like a XR750 flat track racer Manufactured in die cast aluminum with CNC milled gasket surface Mounts in place of stock...$527.99 -
Out of stock
HardDrive - Oil Filter Housing
HardDrive
$89.95The HarDrive Oil Filter Housing: Meets OEM specifications Chrome finish Accepts all EVO style oil filters$89.95 -
Out of stock
HardDrive - Shovel Rocker Arms - Front Exh/Rear Int '66-'84 Big Twins
HardDrive
$40.95The HardDrive Shovel Rocker Arms: Fits '66-'84 Big Twin Models Rocker arms include bushings$40.95 -
Out of stock
HardDrive - Shovel Rocker Arms - Rear Exh/Front Int '66-'84 Big Twins
HardDrive
$40.95The HardDrive Shovel Rocker Arms: Fits '66-'84 Big Twin Models Rocker arms include bushings$40.95 -
Out of stock
Colony - 8141-34 Cadmium Stock Engine Case Bolt Kit fits '70-'78 FL, '71-'78 FX Models
Colony Machine
$63.72Colony - 8141-34 Cadmium Stock Engine Case Bolt Kit fits '70-'78 FL, '71-'78 FX Models Engine case kit includes all the necessary hardware to bolt together engine cases. Fitment: FX 1971-1978$63.72
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.