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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Colony #3245-2 Valve Spring Cover Wrench Set 1930-1938 Harley-Davidson VL/UL
2 reviews $39.60

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

Colony #3260-36 Head Bolt Set Early 1930 Harley-Davidson VL Models - Parkerized
$96.62

Colony #3246-1 Oil Pressure Switch Nipple 1958-1969 Harley-Davidson Big Twins - CAD Plated
1 review $8.47

Colony #3248-8 Footboard Hinge Rivet Kit 1914-1973 Harley-Davidson All Models
$16.94

Colony #3250-12 Windshield Mounting Kit 1936-1957 Harley-Davidson Models with Springer Fork
$14.83

Colony #3247-2 Shock Stud Spacer Kit 1965-1985 Harley-Davidson FLH
$6.05

Colony #3222-1 Spark Plug Cable Bracket 1966-1984 Harley-Davidson Big Twins - Zinc Plated
1 review $18.15

Gasbox 4 Speed Transmission Mounting Plate for 1958 - 1964 Harley-Davidson Big Twins OEM #47698-58
$59.95

Gasbox 4 Speed Transmission Mounting Plate for 1958 - 1961 Harley-Davidson Big Twins OEM #47698-36A
1 review $59.95

Gasbox Bolt-On Oil Tank for Rigid Harley-Davidson Big Twin Frames 1936-1957
11 reviews $299.99

Colony #3238-2 Oil Pump Cover Nipple 1950 - 1964 Harley-Davidson Big Twins - Chrome — Colony #3238-2 Oil Pump Cover Nipple 1950-1964 Harley-Davidson Big Twins - Chrome Plated
1 review $9.68

Colony #3233-10 Shifter Assembly Cover Screw Kit 1965 - early 1979 Harley-Davidson FL FX — Colony #3233-10 Shifter Assembly Cover Screw Kit 1965-E1979 Harley-Davidson FL/FX
$14.22

Colony #3225-2 Delco-Remy Horn Diaphram Screw and Nut Kit 1931 - 1957 Harley-Davidson — Colony #3225-2 Delco-Remy Horn Diaphram Screw & Nut Kit 1931-1957 Harley-Davidson - Parkerized
$10.89

Gasbox Exhaust Port Clamps 1948-1965 Harley-Davidson Big Twin Models - Stainless Steel OEM #65519-48
$26.00

Gasbox UL Front Pipe to Frame Clamp 2 piece Set 1936-48 UL Harley- Davidson - Parkerized OEM #65511-36
1 review $20.00

Gasbox Rocket Tip Muffler 1941-1949 Harley-Davidson Knuckleheads and 74 and 80 ci Flathead Models - Bare Steel OEM #65251-41
1 review $150.00

Gasbox Panhead Exhaust Pipe Set 1958-1964 Harley-Davidson Swingarm FL FLH 74 ci - Bare Steel
1 review $239.95

Colony #3215-4 Throttle Cable Bracket 1949 - 1953 Harley-Davidson Big Twins — Colony #3215-4 Throttle Cable Bracket 1949-1953 Harley-Davidson Big Twins - Parkerized
$20.57

Colony #3206-2 Fender Brace Bolt Kit 1941 - 1957 Harley-Davidson Big Twins and 45's — Colony #3206-2 Fender Brace Bolt Kit 1941-1957 Harley-Davidson Big Twins/45's - Chrome Plated
1 review $6.66

Colony #3202-4 Switch Box Fastening Bolt Kit 1929 - 1936 Harley-Davidsons — Colony #3202-4 Switch Box Fastening Bolt Kit 1929-1936 Harley-Davidsons - Parkerized
$11.99

Colony #3189-4 Chrome Rocker Arm Shaft Nut Set 1936 - 1947 Harley-Davidson Knuckleheads — Colony #3189-4 Rocker Arm Shaft Nut Set 1936-1947 Harley-Davidson Knuckleheads - Chrome Plated
$65.99

Colony #3211-4 Chain Guard To Gear Box Screw Kit 1930 - 1935 Harley-Davidson VLs — Colony #3211-4 Chain Guard To Gear Box Screw Kit 1930-1935 Harley-Davidson VLs - Parkerized
1 review $5.81

Colony #3214-4 Generator Pole Screw Kit 1951 - 1957 Harley-Davidson Twins — Colony #3214-4 Generator Pole Screw Kit 1951-1957 Harley-Davidson All Twins - Parkerized
$6.96

Colony #3218-1 Steering Damper Knob 1952 - 1966 Harley-Davidson K KH FL FLH Sportster — Colony #3218-1 Steering Damper Knob 1952-1966 Harley-Davidson K/KH/XL 1960-1984 FL/FLH 1960-Up Servi-car
$49.50

Colony #3179-8 Rocker Arm Cover Fitting Nuts and Seals 1957 - 1984 Harley-Davidson FL FX XL XLH XLCH — Colony #3179-8 Rocker Arm Cover Fitting Nuts & Seals 1957-1984 Harley-Davidson FL/FX/XL/XLH/XLCH - CAD Plated
3 reviews $20.90

Colony #3115-3 Headlamp Mounting Kit 1935 - 1948 Harley-Davidson Big Twins and 45's — Colony #3115-3 Headlamp Mounting Kit 1935-1948 Harley-Davidson Big Twins/45's - CAD Plated
$6.05

Colony #2918-3 Rear Brake Spring and Brake Lock Pull 1937 - 1940 Harley-Davidson — Colony #2918-3 Rear Brake Spring & Brake Lock Pull 1937-1940 Harley-Davidson - Parkerized
$32.45

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

Colony #3188-4 CAD Plated Headlamp Housing Mounting Kit 60-78 Harley Davidson FL FLH — Colony #3188-4 Headlamp Housing Mounting Kit 1960-1978 Harley-Davidson FL/FLH - CAD Plated
$12.10

Colony #3064-2 Parkerized Fender Brace Bolt Kit 1941-57 Harley Davidson Big Twin and 45 — Colony #3064-2 Fender Brace Bolt Kit 1941-1957 Harley-Davidson Big Twin/45's - Parkerized
$5.45

Colony #3205-2 CAD Plated Fender Brace Bolt Kit 1941-57 Harley Davidson Big Twin and 45 — Colony #3205-2 Fender Brace Bolt Kit 1941-1957 Harley-Davidson Big Twin/45's - CAD Plated
$5.45

Colony #3198-1 Parkerized Brake Operating Lever 36-57 Harley Davidson Big Twin — Colony #3198-1 Brake Operating Lever 1936-1957 Harley-Davidson Big Twins - Parkerized
$38.50

Lowbrow Customs Louvered Air Cleaner for S&S Super E / G Carburetors - Black
20 reviews $81.78

Colony #3182-5 Jiffy Stand Clevis Pin Clip Chrome Plated Harley Davidson — Colony #3182-5 Jiffy Stand Clevis Pin Clip 1989-Up Harley-Davidson XL 1991-Up Dyna 2002-Up VRSC 2007-Up Softail - Chrome Plated
$12.10

Colony #3181-5 Jiffy Stand Clevis Pin Clip Zinc Plated Harley Davidson — Colony #3181-5 Jiffy Stand Clevis Pin Clip 1989-Up Harley-Davidson XL 1991-Up Dyna 2002-Up VRSC 2007-Up Softail - Zinc Plated
1 review $11.00

Colony #3180-18 Mud Flap Mounting Kit 1932-49 Harley Davidson Big Twins — Colony #3180-18 Mud Flap Mounting Kit 1932-1949 Harley-Davidson Big Twins - Parkerized
$8.80

Colony #3172-1 Ignition Switch Contact Roller Harley Davidson 1936-1984 Big Twins — Colony #3172-1 Ignition Switch Contact Roller 1936-1984 Harley-Davidson Big Twins
$8.47

Colony #3169-1 Chain Oiler Hose Clamp 1978-82 Harley Davidson FL — Colony #3169-1 Chain Oiler Hose Clamp L1978-1982 Harley-Davidson FL/FLH - Zinc Plated
$7.87

Colony #3147-2 Air Horn Cover Mount Screws 1936 Harley-Davidson Knucklehead - CAD Plated
$7.26

Colony #3143-2 Top Plugs For Classic Springer Forks - Brass — Colony #3143-2 Brass Top Plugs For Classic Harley-Davidson Springer Forks
1 review $22.00

Colony #3142-2 Top Plugs For Classic Springer Forks - Aluminum — Colony #3142-2 Aluminum Top Plugs For Classic Harley-Davidson Springer Forks
1 review $22.00

Colony #3138-4 Rocker Arm Oil Line Fitting Kit 1957-84 Harley Davidson — Colony #3138-4 Rocker Arm Oil Line Fitting Kit 1966-1984 Harley-Davidson FL/FX 1957-1984 XL - Parkerized
1 review $19.36

Colony #3122-4 Carburetor Bowl Locknut Brass1930-65 Harley Davidson Big Twins — Colony #3122-4 Carburetor Bowl Locknut 1930-1965 Harley-Davidson Big Twins - Brass
1 review $17.55

Colony #3117-2 Shift Fork Cam Shaft Lock Screw and Oil Seal Kit 1936-79 Harley Davidson Big Twins — Colony #3117-2 Shift Fork Cam Shaft Lock Screw & Oil Seal Kit 1936-1979 Harley-Davidson Big Twins
2 reviews $9.38

Lowbrow Customs Dimpled Steel Motorcycle Oil Tank for H-D Sportster Big Twin and Universal Choppers
29 reviews $224.94

Morris Magneto X5 Magneto for Generator Model Harley Davidson Ironhead Sportsters and 45 Flat Heads
$2,221.77

Morris Magneto T5 Twin Cam Magneto for Harley Davidson - Brushed Finish
$2,453.41

Morris Magneto 74LDMD Dual Magneto Setup for Alternator Big Twin Harley Davidsons - Brushed Finish
$3,101.96

Morris Magneto MM74L Magneto for Alternator Big Twin Harley Davidsons with Aftermarket Cases - Brushed Finish
$1,942.38

Morris Magneto MM74L Magneto for Alternator Big Twin Harley Davidsons 1993 - 1999 - Brushed Finish
$1,942.38

Morris Magneto MM74L Magneto for Alternator Big Twin Harley Davidsons 1970 - 1973 - Brushed Finish
$1,942.38

Morris Magneto Morris M-5 Magneto for Alternator Big Twin Harley Davidsons with Aftermarket Cases - Brushed Finish
$2,395.00

Morris Magneto M-5 Magneto for Alternator Big Twin Harley Davidsons 1993 - 1999 - Brushed Finish
$2,395.00

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

Colony #3154-18 Footboard Mounting Kit Parkerized Harley Davidson Big Twins 1955-57 — Colony #3154-18 Footboard Mounting Kit 1955-1957 Harley-Davidson Big Twins - Parkerized
3 reviews $61.33

Colony #3133-4 Jiffy Stand Mounting Kit Zinc Harley Dyna 1991-up — Colony #3133-4 Jiffy Stand Mounting Kit 1991-Up Harley-Davidson Dyna - Zinc Plated
4 reviews $11.80

Colony #3132-5 Front Brake Hand Lever Bracket Clamp Kit CAD all Harley 1955-64 — Colony #3132-5 Front Brake Hand Lever Bracket Clamp Kit 1955-1964 Harley-Davidson All Models - CAD Plated
$12.34

Colony #3130-5 Front Brake Hand Lever Bracket Clamp Kit CAD all Harley 1941-54 — Colony #3130-5 Front Brake Hand Lever Bracket Clamp Kit 1941-1954 Harley-Davidson All Models - CAD Plated
$12.34

Colony #3128-5 Clutch Hand Lever Bracket Clamp Kit CAD Harley 53-64 K KH XL 41-48 Big Twin 45 Servi-Car — Colony #3128-5 Clutch Hand Lever Bracket Clamp Kit 1953-1964 Harley-Davidson K/KH/XL 1941-1948 Big Twin/45/Servi-Car - CAD Plated
$12.34

Colony #3113-5 Motor Case Breather Stud Parkerized Harley Davidson FL FLH 1958-63 — Colony #3113-5 Motor Case Breather Stud 1958-1963 Harley-Davidson FL/FLH - Parkerized
$57.20

Colony #2912-14 Footboard Mounting Kit Parkerized Harley Davidson Big Twins 1958-64 — Colony #2912-14 Footboard Mounting Kit 1958-1964 Harley-Davidson Big Twins - Parkerized
$79.75

Cycle Electric CE-84T-99 Stator Rotor and Regulator Kit for 1999 - 2003 Harley-Davidson FLH and FLT Models
21 reviews $545.16 $583.57

Autolite Spark Plug- Harley Davidson Sportster / Twin Cam Models - Manufacturer Part #4164
21 reviews $7.70

#3107-16 Front Shock Absorber Upper Mount Kit Harley Springer 1946-57 — Colony #3107-16 Front Shock Absorber Upper Mount Kit 1946-1957 Harley-Davidson Springers - Parkerized
$51.15

#3106-18 Front Shock Absorber Lower Mount Kit Harley Springer 1946-57 — Colony #3106-18 Front Shock Absorber Lower Mount Kit 1946-1957 Harley-Davidson Springers - Parkerized
$97.90

#3098-4 Transmission Case Bottom Stud Kit Harley-Davidson Twins 1915-36 — Colony #3098-4 Transmission Case Bottom Stud Kit 1915-1936 Harley-Davidson Twins
$19.93

#3096-1 Transmission Adjuster Screw Support Strap CAD Harley Big Twins 1936-57 — Colony #3096-1 Transmission Adjuster Screw Support Strap 1936-1957 Harley-Davidson Big Twins - CAD Plated
1 review $18.15

#3095-1 Transmission Adjuster Screw Support Strap Chrome Harley Big Twins 1936-57 — Colony #3095-1 Transmission Adjuster Screw Support Strap 1936-1957 Harley-Davidson Big Twins - Chrome Plated
$21.78

#3094-1 Distributor Adjuster Plate Reproduction Harley-Davidson Twins 1947-64 — Colony #3094-1 Distributor Adjuster Plate 1947-1964 Harley-Davidson Twins/K/KH/Sportster
$14.52

#3093-12 Valve Cover Gasket Kit Harley 1939-48 UL ULH Sidevalves — Colony #3093-12 Valve Cover Gasket Kit 1939-1948 Harley-Davidson UL/ULH Sidevalves
$18.15

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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