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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Cannonball Stealthstarter Electric Starter Kit Rigid Frame 4 Speed Harley-Davidson Big Twins
2 reviews $3,553.55

Cannonball Stealthstarter Electric Starter Kit Swingarm Frame 4 Speed 1958-1985 Harley-Davidson Big Twins
$3,553.55

S&S Cycle SH93 S&S Shovelhead Engine - Complete Harley Big Twin Motor
$9,399.95 $9,999.95

Cycle Electric Generator DGV-5000L 12 Volt - Low Voltage - 1965-1984 Harley-Davidson
41 reviews $514.21 $558.92

Gasbox Bolt-On Horseshoe Oil Tank for 1965+ Harley Four-Speed Swingarm Frames
22 reviews $299.99

Lowbrow Customs Rogue Fender - 1958-84 Harley-Davidson Panhead Shovelhead
118 reviews $299.99

Gasbox Full Rigid Chopper Frame 1936-1999 Harley-Davidson Big Twin 5 Speed - 3" Up - Frisco Tank Mounts - Horseshoe Oil Tank
$1,799.00

Lowbrow Customs T-Bars Handlebars - 10 inch Rise - 1-Inch Diameter - Chrome
23 reviews $119.99

Belt Drives LTD. 8mm/1.5 inch Primary Belt Drive - Kick Start - 1965-1978 Harley-Davidson Big Twins
$556.65 $585.95

Dynatek Performance Electronics 2000I PC Programmable Electronic Ignition Kit for Harley-Davidsons
5 reviews $256.66 $264.43

Lowbrow Customs WX Split Gas Tanks - Bolt-On for 1936 - 1984 Big Twin Harley-Davidsons - 2.25 gallon
82 reviews $399.99

Cycle Electric Generator DGV-5000-LH 12 Volt Low Voltage - 1936-1964 Harley-Davidsons w/Heli Coils
$528.83 $574.82

S&S Cycle S&S Super E Carburetor Assembly - fits Harley Big Twin & Sportster
10 reviews $469.95 $499.95

Old-Stf Cycle Centerline Adjustable Aluminum Transmission Plate - Harley-Davidson Big Twin 4 Speeds
3 reviews $249.00

Cycle Standard 39MM Chrome Fork Tubes - 31 inch - 6 Over
14 reviews $223.69

Gasbox Bolt-On Oil Tank for Rigid Harley-Davidson Big Twin Frames 1936-57
10 reviews $299.99

Dynatek Performance Electronics Dyna S Ignition Complete Kit - Dual Fire for Harley Davidson
17 reviews $204.43

Belt Drives LTD. 8mm/1.5 inch Primary Belt Drive - Kick Start - 1979-E1984 Harley-Davidson Big Twins
$556.65 $585.95

Cycle Standard 39MM Chrome Fork Tubes - 29 inch - 4 Over
4 reviews $218.80

Lowbrow Customs Narrow Rabbit Ears Handlebars - 1 inch - Chrome
40 reviews $119.99

Lowbrow Customs Complete 21 inch Ribbed Spool Hub Chopper Wheel - 3/4 inch Bearings - Black
9 reviews $269.99 $299.99

FNA Custom Cycle Tite Seal Intake Manifold Kit for 1948-1984 Harley Big Twin & Sportster
55 reviews $55.95

Mid-USA 16 x 3.00 Chrome Complete Front / Rear Wheel fits Harley-Davidson Big Twins 1973-1984
13 reviews $206.50

Gasbox Exhaust Pipe Set 2-into-1 1970-84 Harley Cone Shovelhead - Chrome OEM # 65435-70
11 reviews $279.99

Lowbrow Customs Big Twin Harley-Davidson Engine Stand (1936-1999) - Fits Knucklehead, Panhead, Shovelhead, Evo Motors
49 reviews $59.99

Mullins Chain Drive 39mm Super Narrow Tree Set
17 reviews $500.00

Gasbox 007 Stainless Air Cleaner for 1991-2022 Harley-Davidson CV Carburetor/EFI
32 reviews $99.95

Lowbrow Customs Complete 21 inch Ribbed Spool Hub Chopper Wheel - 3/4 inch Bearings - Chrome
20 reviews $299.99

Morris Magneto Morris M-5 Magneto for Harley Davidson Big Twin 1974-1992 – Brushed Finish
$2,395.00

Mid-USA Forward Controls 1936-1999 Harley-Davidson Big Twin - 5/8" Bore - Black Billet
$249.99

S&S Cycle Super E Carburetor Kit 1993-99 Harley-Davidson Big Twin
$719.96 $799.95

Belt Drives LTD. 2" SS Belt Drive - Without Cover - 1990-2006 Harley-Davidson FXST/FLST
$2,138.40 $2,250.95

Cycle Electric Alternator Kit 32 amp CE-32A - Harley-Davidson Evo Big Twins
3 reviews $354.35 $385.16

Cycle Electric CE-84T-99 Stator Rotor and Regulator Kit for 1999 - 2003 Harley-Davidson FLH and FLT Models
18 reviews $514.12 $558.83

Cycle Electric DGV-5000 12V Generator for Harley-Davidson 1965-1984
52 reviews $509.63 $553.95

Lowbrow Customs Louvered Air Cleaner for Harley CV / EFI 1991-2020 - Chrome
77 reviews $69.99

Cannonball Springbrake Disc Brake Kit for I-Beam And Classic Springer Forks - Star Hub
$1,018.02

Mid-USA Forward Controls 1936-1999 Harley-Davidson Big Twin - 3/4" Bore - Black Billet
$249.99

Belt Drives LTD. 11mm/1.5 inch Primary Belt Drive with Idler Gear - Electric Start - 1965-E1984 Harley-Davidson Big Twin
$659.25 $693.95

Unity Manufacturing Torque Wrench Dogbones Adaptor Set
25 reviews $45.00

Lowbrow Customs Lowbrow Customs Springer Lil Speedies Handlebars - 1 inch - Raw
$149.99

Samwel Supplies Classic Inline Springer Front Fork - Black/Black Springs - Stock Length
$1,940.45

Bates BattBoy Battery Box for Modern Gel or Li-Ion Batteries fits OEM-style Harley-Davidson Horseshoe Oil Tanks
26 reviews $121.62

V-Twin Manufacturing Chrome Fork Neck Cup Kit with Fork Stops for Harley-Davidson Big Twins
9 reviews $78.22

Gasbox Full Rigid Frame 1936-1999 Harley-Davidson Big Twin 5 Speed - Frisco Tank Mounts - Horseshoe Oil Tank
$1,799.00

Gasbox Full Rigid Frame 1936-1999 Harley-Davidson Big Twin 4 Speed - Frisco Tank Mounts - Horseshoe Oil Tank
1 review $1,799.00

Gasbox Full Rigid Chopper Frame 1936-1999 Harley-Davidson Big Twin 4 Speed - 3" Up - Sporty Tank Mounts - Horseshoe Oil Tank
$1,799.00

Gasbox Full Rigid Frame 1936-1999 Harley-Davidson Big Twin 4 Speed - Sporty Tank Mounts - Horseshoe Oil Tank
$1,799.00

American Prime Mfg. Transmission Bearing Support
2 reviews $59.95

Cycle Standard Chrome Flexible Exhaust Cover for vintage Harley & Universal
17 reviews $46.57

Drag Specialties 5 ohm Dual Fire Coil - for Points Ignition
15 reviews $74.95

American Prime Mfg. Comp Master Ignition Advance Unit - 1970-Up Harley-Davidson Replaces OEM# 3251770T
4 reviews $76.40

Lowbrow Customs Rigid Shock Struts for Harley-Davidson Motorcycles
8 reviews $124.99

Gasbox Shovelhead Exhaust Pipe Set 2-into-1 for 1970-84 Harley Cone - Bare Steel OEM # 65435-70
24 reviews $214.99

Cycle Electric Rectifying Regulator CE-320 - 1989-1996 Harley-Davidson FL 1989-98 FXD FXR
19 reviews $155.69 $169.23

Lowbrow Customs Dimpled Steel Motorcycle Oil Tank for H-D Sportster Big Twin and Universal Choppers
28 reviews $209.99

Mid-USA 16 x 3.00 Chrome Complete Rear Wheel fits all Harley-Davidson 1979-1999
22 reviews $206.50

V-Twin Manufacturing Offset Spring Fork Assembly 1997-2005 Harley-Davidson FLSTS - Black
$1,639.46 $1,782.02

Gasbox Upswept Exhaust Pipe Set 1948-1957 Harley-Davidson Rigid Panhead - Chrome
5 reviews $199.00

Lowbrow Customs 39mm Solid Riser Bushings for Harley-Davidson - Aluminum
31 reviews $30.79

Cycle Electric Stator CE-8999 for 1989-1999 Harley-Davidson Evo Big Twins with 32 amp Alternator
22 reviews $104.65 $113.75

Cycle Standard Isolator Motor Mount - Front - 1991-2017 Harley-Davidson Dyna
3 reviews $99.11 $123.89

Belt Drives LTD. 2 inch Shorty Belt Drive 1970-1978 Harley-Davidson Big Twins
$1,559.85 $1,641.95

Lowbrow Customs Premium Stainless Steel Intake Clamp Kit 1955-1977 Harley-Davidson FL/FX/XL
$27.99

Cycle Electric Generator DGV-2569 model 65A 12v for Harley-Davidson 1936 - 1984
12 reviews $383.52 $416.87

Cycle Standard Fat Bob Style Gas Tanks - 1948-1984 Harley-Davidson FX/FL - 3.5 Gallon
$249.95

Cycle Standard 5 Stud Clutch Hub Assembly - Harley-Davidson Big Twins 1941-1984 OEM # 37550-41B
5 reviews $96.42

V-Twin Manufacturing 21 x 2.15 Front Star Hub Chrome Wheel 1937-1948 Harley-Davidson UL 1936-1940 EL 1941-1966 FL
$463.50 $503.80

Marion Metalworks Universal Headlight Mounting Bracket/Eyebrow Delete
13 reviews $60.00

S&S Cycle Super E Carburetor Kit 1966-78 Harley-Davidson Shovelhead
3 reviews $719.96 $799.95

V-Factor Motorcycle Parts Lever Action Starter Solenoid 1965-1986 Harley-Davidson Big Twin 4 Speed 1984-1988 Softail - Chrome
5 reviews $119.95

Cycle Standard Chrome Mesh CV Carb Air Cleaner - Sportster & Big Twin Harley
39 reviews $86.50

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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