Which models are considered Big Twins?

Big Twins refer to larger displacement Harley-Davidsons, including Flathead, Knucklehead, Panhead, Shovelhead, Evo, and Twin Cam.

Do I need any special tools for installing custom Big Twin parts?

Basic hand tools usually suffice, but some installations (like welding) may require specialized equipment or professional assistance.

Can I return items if they don’t fit my Big Twin?

Absolutely. As long as the part is in original, unused condition, you can return it according to our standard return policy.

Harley-Davidson Big Twin Parts

Sort by

LCFabrications Brake Switch Pod Delete - Polished - for H-D
16 reviews $35.00

Colony #3308-6 Locking Exhaust Bolt Kit 1966-1984 Harley-Davidson Shovelhead
13 reviews $22.00

FNA Custom Cycle Tite Seal Kit Replacement Seals
2 reviews $20.00

Marion Metalworks Super Carb Mounting Kit
$60.00

Unity Manufacturing Two Bolt Intake Leak Tester
4 reviews $30.00

Cycle Standard Oil Temperature Dipstick OEM #62896-00 Harley-Davidson 2000 & Up Softail
19 reviews $36.14

Fast Eddy Co. No. 56 Intake Leak Tester - 4 Bolt Style
1 review $59.95

Colony #8618-20 Big Bore Headbolt & Washer Kit 1949-Up Harley-Davidson Panhead/Shovelhead - Black
4 reviews $47.80

Cycle Standard Fork Neck Cup Set for 1948-1986 Harley-Davidson Big Twins OEM #48311-60
4 reviews $50.00

Airspeed Cycles T-Bar Handlebars - 10 inch Rise - 1 inch - Stainless Steel
2 reviews $235.00

Cycle Standard Chrome Headlight Eyebrow Visor for Harley Sportster FX FX FXR - with Indicator Light Holes
$42.25

Cycle Standard 11" Chrome Shocks With Chrome Spring - 1 inch Under - 1973-1984 Harley-Davidson FX/FXE 1972-1984 FL
$233.91

Prism Supply Co. Darlington Air Cleaner - CV Carburetor - Polished
$229.99

Cycle Standard Popsicle Kicker Pedal with Rubber for 1977 & earlier Harley-Davidson Kicker Arms Replaces OEM #33175-16A
18 reviews $27.65

Cycle Standard S&S Super E/G Carburetor Adapter for CV Air Cleaners - Black
$33.53

Drag Specialties 15A Circuit Breaker 1970-1999 Harley-Davidson Big Twin/XL 1999 Twin Cam
1 review $10.95

S&S Cycle Super E Manifold Conversion Kit for 80" Harley-Davidson Evolution
1 review $242.24 $254.95

Cycle Standard Kickstand Spring 1936-1987 Harley-Davidson Big Twins / Pre 1984 Ironhead Sportster Models - Chrome - OEM #50011-30
44 reviews $9.04

Colony #2454-36 Pushrod Cover Complete Kit Billet Alloy 1984-Up Harley-Davidson Big Twin Evo - Chrome Plated
$225.17

After Hours Choppers Stainless Steel Ratchet Top Shifter - Straight Up - Raw
$225.00

9 Finger Fabrication Engine Case Bore Plug Set - Harley-Davidson Evolution/Shovelhead/Sportster
5 reviews $45.00

Gasbox Strong Arm Top Engine Mount For Early Big Twin Engines In Gasbox Frames
$74.95

Drag Specialties Clutch Cable OEM #38618-68C Harley-Davidson 4 Speed Big Twin 1968-1986
$56.13

Cycle Standard Screw-In Harley Stock Style Vented Gas Cap - 1982-1995 - Black
$23.51

Cycle Standard Throttle Cable OEM #56356-96A Harley Dyna 1996-2008 +4 inch Extended
$39.63

Cycle Standard Heel-Toe Shift Lever - 1965-1984 Harley-Davidson FL/FLH (With Splines) - Chrome - OEM #34692-74TA
$59.36

Lowbrow Customs Spare Parts Book for 1936-1948 Harley-Davidson Knucklehead and Flathead
8 reviews $38.83

Dandlebars Feeler Gauges for 1930-1984 Harley-Davidsons
2 reviews $31.66

S&S Cycle Super E T-Style O-Ring Manifold 1955-65 Harley-Davidson Big Twin
$116.84 $122.95

Colony #8303 CAD Complete Stock Hardware Kit - 1958-1965 Harley-Davidson Panhead - CAD Plated
2 reviews $221.05

Cycle Standard Chrome Kick Return Spring - 1936 - 1984 Harley Knucklehead Panhead Shovelhead #33085-3
4 reviews $26.08

Cycle Standard Replacement Dished Sprocket - Chrome - 51 Tooth - 1973-84 Harley-Davidson Big Twin 1979-81 XL OEM #41470-73
1 review $75.02

Hawg Supply Honeycomb Kicker Pedal
$109.99

Hawg Supply Ratchet Top Shifter - Straight Arm
1 review $109.99

Fast Eddy Co. No. 31 Neck Bearing Race Remover / Installer
6 reviews $54.95

Drag Specialties Dual Gauge Bracket - Chrome - 1995-2001 Harley-Davidson XL1200 99-05 FXDX 95-00 FXDX-CONV
$219.37

Drag Specialties 3-1/2 inch Pullback Handlebar Riser Set - Black
$108.07

Lowbrow Customs Motor Company Aluminum Shifter Peg for Harleys
22 reviews $20.78

Lowbrow Customs 60 psi Oil Pressure Gauge - White Face
24 reviews $46.49

Lowbrow Customs Bottom Mount Headlight Bracket Harley-Davidson Springers 1936 - 1949
2 reviews $53.41

Cycle Standard Rocker Box D-rings - Polished - 1948-65 Harley-Davidson Panhead
$111.74

Unity Manufacturing Hydraulic Pushrod Wrench Set
3 reviews $35.00

Cycle Standard Wagner Lockheed Type Rear Drum Brake Master Cylinder - Chrome - 1958-1972 Harley-Davidson FL 1971-1972 FX
$110.07

Colony #2487-2 Pike Nut Rear Axle Covers 1984-2007 Harley-Davidson Softail - Chrome Plated
4 reviews $69.58

Colony #7811-14 Inner Primary Mounting Kit - 1936-1954 Harley-Davidson Knucklehead/Panhead
1 review $26.08

Drag Specialties Upper Fork Slider Bushings - 39mm - 0.588" - Harley-Davidson OEM #45461-87
2 reviews $16.00

S&S Cycle Quickee Adjustable Pushrod Set - 1984-1999 Harley-Davidson Big Twin
2 reviews $206.26 $224.95

Colony #7137-22 High Crown Acorn Rocker Box Bolt Kit - 1966-1984 Harley-Davidson Shovelhead - Chrome Plated
4 reviews $51.43

Bates Linkert 3-Bolt Carb Throttle Conversion Kit 1936-39 Harley-Davidson Knucklehead and All Flatheads
2 reviews $68.14

Colony #8603-8 Adjustable Pushrod & Solid Lifter Kit 1984-Up Harley-Davidson Evo
2 reviews $102.11

James Gaskets Top End Gasket Kit 1948-1965 Harley-Davidson Panhead
1 review $40.59

Cycle Standard Throttle Idle Cable OEM #56355-96A Harley Dyna 1996-2008 - Blacked Out
2 reviews $25.35 $36.21

Cycle Standard 5-1/2 inch Pullback Handlebar Riser Set - Black
$106.42

Lowbrow Customs Mounting Kit for WX Gas Tanks - 1985-1999 Harley-Davidson Softails
4 reviews $70.10

Cycle Standard Bungee Nuts - 3/8-16 OEM #98185-90T
10 reviews $12.55

Colony #7507-20 Upper Pushrod Cover Kit 1957-1985 Sportster 1948-1965 Panhead - Chrome Plated
3 reviews $50.08

Marion Metalworks Big Twin Fabricator Shifter Plate - Stainless Steel
$20.00

Unity Manufacturing Four Speed Clutch Lockup Tool - BDL/Pro-Clutch
3 reviews $50.00

Prism Supply Co. Sling Shot Clutch Control - Harley-Davidson 4 Speed - Stainless Steel
1 review $199.99

Led Sled Customs Smoothie Oil Tank for Harley-Davidson Choppers
5 reviews $199.95

James Gaskets Primary Cover Gasket 1965-1988 Harley-Davidson Big Twin
$24.91

Gasbox Peg Mount License Plate Bracket - 1984-2017 Harley-Davidson Softail - Vertical or Horizontal
8 reviews $49.95

Cycle Standard Stock Style Chrome Kicker Lever - 1936 - 1977 Harley Big Twin and 1957 - 1976 XL
5 reviews $52.05

Gasbox S&S Carburetor Support Bracket - Harley-Davidson Evo Big Twin and Strokers - Tumbled Stainless
10 reviews $21.95

V-Factor Motorcycle Parts 18 Spoke Stainless Steel Brake Rotor - 11.5 inches - Front - Replaces Harley-Davidson OEM #44136-92/44156-00
1 review $65.40

Gasbox Heavy Duty Coil Mount - Big Twin 1965 - 1982
18 reviews $21.95

Cycle Standard Screw-In Harley Stock Style Vented Gas Cap - 1982-1995 - Chrome
$29.43

Colony #7823-12 Pushrod Covers 1948-Early 1979 Harley-Davidson Panhead & Shovelhead - Chrome Plated
4 reviews $64.80

Lowbrow Customs Domed Screw-In Gas Cap for Harley-Davidson 1996 & later - Aluminum
12 reviews $53.41

Lowbrow Customs Lowbrow Customs Springer Lil Speedies Handlebars - 1 inch - Chrome
2 reviews $202.45

Cycle Standard Exhaust Port Gasket 1984-2024 Harley-Davidson Big Twins 1986-2022 XL OEM# 17048-98 - 2 Pack
$12.10

S&S Cycle Throttle Cable Guide - Use a CV Cable on an S&S Super E/G Carburetor
8 reviews $38.27 $40.95

Harley-Davidson Big Twin motorcycles are legendary for their raw power, distinctive style, and unmatched capacity for customization. From the Flathead and Knucklehead to the Panhead, Shovelhead, Evo, and Twin Cam, each Big Twin engine carries its...

If you’re looking to transform your ride—enhancing speed, comfort, or that unmistakable retro look—explore our Harley-Davidson Big Twin Parts collection. We have everything you need to customize your bike, whether you’re focusing on performance upgrades or eye-catching aesthetics.

Why Upgrade a Harley-Davidson Big Twin?

Boundless Customization: Big Twins allow for radical transformations—from stripped-down bobbers to vintage choppers—letting you express your unique vision.
Enhanced Performance: Boost horsepower, torque, and responsiveness with high-quality ignition kits, carburetors, and more.
Personalized Aesthetics: Whether it’s a retro-inspired racer or a comfortable tourer, your bike can reflect your style and riding needs.

Why Buy Big Twin Motorcycle Parts at Lowbrow Customs?

We curate top brands and rigorously test products for durability, fitment, and performance before shipping them out.
Variety of Choices: We offer a carefully curated selection of motorcycle parts for a wide range of Big Twin engines—from the Flathead and Knucklehead to the Panhead, Shovelhead, Evo, and Twin Cam—so you can find the perfect fit for your ride.
Expert Guidance: Need advice on installing a gas tank or swapping out your ignition? Our dedicated staff is here to help—from how-to videos to step-by-step articles.
Passion for Custom Builds: We’re not just sellers—we’re fellow riders who believe in the art of motorcycle customization. Count on our expertise to bring your dream bike to life.
Wide Selection & Fast Shipping: Our warehouse in northeast Ohio is stocked daily, ensuring you get the parts you need quickly. Plus, enjoy free economy shipping on U.S. orders over $99 and flexible return policy within 90-day & no return fee.

Our Featured Big Twin Motorcycle Parts Products

Ignition Kits & Carburetors: Gain more power and better throttle response by upgrading your ignition and carb system. A refined setup can increase speed, torque, and overall rideability.
Custom Gas Tanks: Our Big Twin gas tanks are crafted from high-grade steel, pressure-tested to prevent leaks, and available in multiple shapes and capacities. Achieve the perfect balance between form and function.
Handlebars & Controls: From vintage ape hangers to sporty drag bars, our collection of handlebars offers different heights, widths, and designs. Complete the setup with controls like grips, mirrors, and brake/clutch assemblies for a cohesive look.
Retro Accessories: Elevate your Big Twin’s retro appeal with add-ons like vintage-inspired seats, windshield options, saddle bags, or even a top-mounted box for touring. Personalizing these details completes the old-school charm.

Ready to Customize Your Harley-Davidson Big Twin?

Explore our Harley-Davidson Big Twin Parts collection today and transform your ride into the perfect blend of power, comfort, and style. If you have questions, reach out to our expert support team or dive into our installation guides for pro tips. Let’s make your dream bike a reality—shop now and gear up for the open road.

Read less

Harley-Davidson Big Twin Parts FAQ

STAY CONNECTED
WITH LOWBROW

NO SPAM, EVER. JUST GREAT STUFF. YOUR INFO IS NEVER SHARED.