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

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Lowbrow Customs Distributor Circuit Breaker Wrench for Harley-Davidson Big Twin Knucklehead Panhead #94501-56
8 reviews $21.09

Colony #8202-18 Rear Fender Mounting Kit 1936-1957 Harley-Davidson Big Twins - CAD Plated
$42.00

K&N Air Filters Oil Filter - Chrome - 1982-1985 Harley-Davidson Big Twin - K&N Part # KN-172C
$20.99

Colony #8623-2 Seat Clevis Pin & Spring 1929-Up Harley-Davidson
5 reviews $13.94

Colony #9010-5 Linkert Carb Support Bracket 1954-1965 Harley-Davidson OEM #27431-41B - Parkerized
3 reviews $20.90

Colony #3292-9 Rear Chain Guard Mounting Kit 1963-1982 Harley-Davidson FL/FLH - CAD Plated
$13.92

Colony #2743-2 Oversized Ignition Timer Cover Stud Kit 1980-Up Harley-Davidson Big Twin/Sportster - Zinc Plated
1 review $13.92

Colony #2538-2 Ignition Timer Cover Stud Kit 1972-1979 Harley-Davidson Big Twin - Zinc Plated
1 review $13.92

Colony #2450-1 Wire Clip Front Frame Leg 1936-1969 Harley-Davidson Big Twin - Parkerized
1 review $13.92

Lowbrow Customs Chrome Solo Seat Bolt-On Spring Mounts for Harley-Davidson Swingarm Frames 1958 - 1985
1 review $41.61

Cycle Standard Clutch Cable OEM #38602-92 Harley Dyna 1992-2005 - Blacked Out
$41.41 $59.15

Cycle Standard Headlight Visor - 5-3/4" Headlight - Black - Replaces OEM #69735-05
4 reviews $41.40

Colony #3678-16 Lower Motor Mount Kit 1936-1957 Harley-Davidson OHV Big Twins - Parkerized
$40.70

Fast Eddy Co. No. 4 Cam Gauge Pins .105" 1989 & earlier Harley Big Twins
1 review $39.95

Colony #9602-8 Oil Tank Mounting Kit - 1936-1957 Harley-Davidson Knucklehead/Panhead- Chrome Plated
2 reviews $19.97

Colony #9653-4 Transmission Case Bottom Stud Kit 1936-1983 Harley-Davidson Big Twins - Parkerized
4 reviews $19.93

Colony #3737-2 Air Cleaner Cover Mounting Screw Kit 1983-Up Harley-Davidson Big Twins - Zinc Plated
$13.20

Colony #3567-1 Front Wheel Hub Plate 1991-1999 Harley-Davidson XL 1984-1999 FXR/FXD - Silver
3 reviews $19.80

Colony #7344-6 Intake Manifold Conversion Nipple Kit 1940-1954 Harley-Davidson 74's
1 review $39.47

Lowbrow Customs FiltroMax Big Twin Bracket - Black
3 reviews $39.45

Colony #9926-17 Upper & Lower Motor Mounting Allen Kit 1970-1984 Harley-Davidson Big Twin - Chrome Plated
$39.11

Colony #9884-20 Motor Case Flanged Hardware Kit 1996-Up Harley-Davidson Big Twin Evo - Zinc Plated
$39.11

Cycle Standard Fly By Wire Throttle Tube - 1 inch - Black
26 reviews $12.97

Colony #2900-1 Motor Sprocket Nut 1991-2006 Harley-Davidson Big Twins
2 reviews $19.36

Colony #2815-2 Spring Retainer and Acorn Nut Set 1939-1948 Harley-Davidson Big Twin Springers 1936-1952 45s 1953-1954 Servi-car - Parkerized
$19.36

Cannonball Kicker Clutch/Housing Puller for Cannonball StealthStarter Kick Drive Systems
$38.56

Colony #3708-1 Instrument Panel Cover Plate Left Side 1939-1946 Harley-Davidson All Models - CAD Plated
$7.70

Colony #2851-1 Wheel Bearing Locknut Tool Harley-Davidson XL/FL/FLH/FX/Sidecar/Servi-car
5 reviews $38.50

Autolite Spark Plug- 1975-1981 Shovelhead & Evo Big Twins - Manufacturer Part #4265
14 reviews $7.70

Colony #9918-8 Rocker Arm Stud Nut Kit 1948-1965 Harley-Davidson Panhead - CAD Plated
2 reviews $19.12

Colony #8609-36 Rocker Box Nut Kit 1966-1983 Harley-Davidson Shovelhead - CAD Plated
$12.67

Colony #9932-8 Intake Manifold to Cylinder Head Allen Kit 1995-Up Harley-Davidson Big Twins/XL
2 reviews $6.33

Colony #2385-1 Oversized 9/16-18 Thread Tap for Stripped Drain Hole 1965-Up Harley-Davidson Big Twin 1967-Up Sportster
3 reviews $37.66

Colony #9847-9 Banjo Style Oil Feed Line Fitting Kit 1936-1941 Harley-Davidson Knucklehead - Chrome Plated
$37.66

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

Colony #3060-5 Foot Clutch Lever Friction Disc Kit 1936-1940 Harley-Davidson Knucklehead 1938-1952 45 Solo 1938-1946 Servi-car - Parkerized
$37.39

Cycle Standard Battery Hold Down Rod - Chrome - Early Harley-Davidson 6 Volt Big Twins
3 reviews $18.44

Lowbrow Customs Acorn Stem Nut - Chrome - for Straton Springers & 1936-48 Harley-Davidson Big Twin Springers 1936-52 45's
$9.17

Colony #9937-20 Front Motor Mount Allen Kit 1991-Up Harley-Davidson Dyna - Chrome Plated
1 review $18.34

Colony #8866-8 Sprocket Cover / Master Cylinder Mounting Kit Acorn Head 1986-Up Harley-Davidson - Chrome Plated
2 reviews $18.34

Colony #2096-14 Headlamp and Horn Bracket Insulator Terminal Kit 1945-1948 Harley-Davidson Big Twin 1945-1957 Servi-car
$36.54

Cycle Standard Oil filter 1941-1964 Harley-Davidson Big Twins with Remote Oil Filter Unit OEM #63840-48A
7 reviews $9.09

Colony #3591-10 Sprocket Bolt & Nut Kit 1973-Up Harley-Davidson Big Twins/XL - Zinc Plated
$18.15

Colony #3032-4 Cam Follower & Retainer Kit 1952-1979 Harley-Davidson FL/FLH 1971-1979 FX
$36.30

Colony #2551-2 Clutch Foot Lever Bracket Bushings 1936-1978 Harley-Davidson Big Twins 1938-1952 45's
$12.10

Colony #8715-4 Rear Axle Nut & Washer Kit 1973-Up Harley-Davidson Big Twin 1979-Up XL - Chrome Plated
1 review $18.15

Cycle Standard Oil Temperature Dipstick OEM #62668;828-87 Harley-Davidson 1984-99 Softail FXST FLST 1979-2003 XL
29 reviews $36.28

Colony #3685-12 Lower Motor Mount Kit 1966-1969 Harley-Davidson OHV Big Twins - Chrome Plated
$36.03

Cycle Standard Harley Engine Temperature Sensor - Replaces 32446-99
3 reviews $18.01

Cycle Standard 39MM Upper Fork Slider Bushings - 0.588" - 1988-2015 Harley-Davidson Sportster XL 1988-1994 FXR 1991-2005 FXD OEM# 45461-87
$12.00

Unity Manufacturing Two Bolt Carburetor Support Bracket - Stainless Steel
4 reviews $18.00

Colony #9420-21 Transmission Mounting Kit Late 1977-1986 Harley-Davidson Big Twin - Chrome Plated
3 reviews $35.84

Colony #8791-10 Disc Rear Rotor to Hub Screw Kit 1979-1991 Harley-Davidson FX/XL 1981-1984 FL - Chrome Plated
2 reviews $17.88

Colony #2747-8 Rear Axle Adjusters Swingarm End Cover Kit 1997-2001 Harley-Davidson FLT - Zinc Plated
3 reviews $35.20

Colony #2808-1 Oversized Transmission and Oil Tank Drain Plug 2000-Up Harley-Davidson Big Twins - Zinc Plated
6 reviews $8.80

Colony #9005-4 Throttle Cable Bracket 1936-1948 Harley-Davidson OHV Big Twin - Parkerized
2 reviews $17.60

Colony #3634-2 Reproduction Footrests 1952-1990 Harley-Davidson K/KH/XL 1971-1991 FX
$35.00

Prism Supply Co. Ratchet Top Shifter Plate - Stainless Steel
$34.99

Gasbox Gorilla Headlight Mount for Harley FL 41mm Wide Glide Front Forks
$34.95

Colony #8733-24 Valve Cover Screws 1-1/4 inch Long 1954-1965 Harley-Davidson Panhead With Alloy D-Rings - CAD Plated
$34.93

Colony #7142-4 Knucklehead Type Rocker Arm Shaft End Plug - 1971-1985 Harley-Davidson Shovelhead 1971-85 Sportster - Chrome Plated
7 reviews $34.85

Colony #9893-18 Gas Tank Mounting Kit 1937-1975 Harley-Davidson Big Twin 1972-1972 FX - Parkerized
3 reviews $17.42

Colony #2528-10 Gas Tank Allen Mounting Kit 1990-1995 Harley-Davidson Softail - Chrome Plated
$17.40

Colony #3255-8 Tappet Screw & Nut Kit 1936-1952 Harley-Davdison Big Twins
$34.65

Colony #2108-12 Headlamp Bracket Mounting Kit 1955-1959 Harley-Davidson Big Twin - CAD Plated
$34.52

Colony #2048-4 Footpeg Mounting Low Head Allen Bolt/Nut Kit 1969-Up Harley-Davidson FL/FX/XL - Chrome Plated
2 reviews $17.22

Colony #8445-12 Timing Cover Cap Set 1936-1969 Harley-Davidson 74 & 61 cu. in. OHV - Chrome Plated
1 review $34.40

Colony #2288-1 Sprocket Shaft Nut 1972-1985 Harley-Davidson Big Twins - Parkerized
1 review $17.05

Colony #3594-1 Handlebar To Fork Cable Guide Cover 1949-1960 Harley-Davidson Big Twins 1958-1960 Servicar
$16.94

Colony #2742-2 Left Bearing End Oil Slinger 1936-1954 Harley-Davidson Big Twin
$16.94

Colony #2638-8 Rear Master Cylinder Mounting Kit 1987-1999 Harley-Davidson Softail - Zinc Plated
9 reviews $16.94

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.

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Harley-Davidson Big Twin Parts FAQ

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