Big Twin Fabrication Parts

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      109 products
      A TC Bros. Tall Kickback DIY Sissy Bar Kit, consisting of a pair of metal rods on a white background.
      A black motorcycle parked in front of a grassy area with a TC Bros. Tall Kickback DIY Sissy Bar Kit.
      TC Bros.
      TC Bros. Tall Kickback DIY Sissy Bar Kit
      $109.95
      42 reviews
      A pair of TC Bros. Tall DIY Sissy Bar Kit rods, screws, and axle plate mounting tabs on a white background.
      A motorcycle parked on the side of the road with a TC Bros. Tall DIY Sissy Bar Kit.
      TC Bros.
      TC Bros. Tall DIY Sissy Bar Kit
      $109.95
      49 reviews
      A TC Bros 5 inch Round Chopper Oil Tank Flat Ends Universal Fit metal cylinder with holes, suitable as an oil tank, made in the USA.
      A TC Bros 5 inch Round Chopper Oil Tank Flat Ends Universal Fit metal bottle made in the USA, featuring a hole in it for oil tank.
      TC Bros.
      TC Bros 5 inch Round Chopper Oil Tank Flat Ends Universal Fit
      $159.95
      39 reviews
      A TC Bros 5 inch Round Pill Style Chopper Oil Tank Universal Fit made of CNC machined stainless steel on a white background, providing a universal fit for oil storage.
      A close up of the TC Bros 5 inch Round Pill Style Chopper Oil Tank Universal Fit on a universal fit motorcycle.
      TC Bros.
      TC Bros 5 inch Round Pill Style Chopper Oil Tank Universal Fit
      $179.95
      28 reviews
      TC Bros. offers TC Bros. e-gift cards for motorcycle enthusiasts.
      TC Bros.
      TC BROS. GIFT CARD
      from $10.00
      Chop Source DIY Motorcycle Frame Jig Kit that includes structural tubing. (Great for Chopper and Bobber Frame Building)
      An image of a motorcycle frame on a DIY Motorcycle Frame Jig Kit By Chop Source stand.
      Chop Source
      DIY Motorcycle Frame Jig Kit By Chop Source (Great for Chopper and Bobber Frame Building)
      $399.95
      13 reviews
      A set of Universal Frisco Gas Tank Mounting Kit by TC Bros bolts and washers for a motorcycle, including Stainless steel button head bolts.
      A close up of a motorcycle engine with Universal Frisco Gas Tank Mounting Kit by TC Bros mild steel tophat bungs.
      TC Bros.
      Universal Frisco Gas Tank Mounting Kit by TC Bros
      $28.95
      41 reviews
      Product description: A pair of TC Bros. Dual Bag Air Ride Solo Seat Bracket Kit cylinders on a white background.
      A picture of the TC Bros. Dual Bag Air Ride Solo Seat Bracket Kit, emphasizing its SEO value for product description purposes.
      TC Bros.
      TC Bros. Dual Bag Air Ride Solo Seat Bracket Kit
      $189.95
      32 reviews
      A TC Bros. Weld On Rear Ribbed Fender Mount for Bobbers & Choppers bracket with bolts and nuts featuring vintage style curves and contours.
      A close up of a Weld On Rear Ribbed Fender Mount for Bobbers & Choppers by TC Bros. with a metal handle featuring vintage style curves and contours.
      TC Bros.
      Weld On Rear Ribbed Fender Mount for Bobbers & Choppers by TC Bros.
      $21.95
      31 reviews
      The Antigravity Lithium Battery - 12 Cell AG-1201 - Small Case, by AntiGravity, is a compact form factor lithium-ion battery consisting of 12 cells.
      AntiGravity
      Antigravity Lithium Battery - 12 Cell AG-1201 - Small Case
      $219.95
      A TC Bros. Kickback DIY Sissy Bar Kit and a set of screws for bike installation.
      A TC Bros. Kickback DIY Sissy Bar Kit with blue tape on it is sitting in a garage.
      TC Bros.
      TC Bros. Kickback DIY Sissy Bar Kit
      $99.95
      37 reviews
      A TC Bros Heavy Duty Oil Tank Mounting Kit For 1982-2003 Sportster Hardtail with universal applications, including metal parts, hardware, and an oil tank mounting kit.
      A TC Bros Heavy Duty Oil Tank Mounting Kit For 1982-2003 Sportster Hardtail motorcycle is parked on the side of the road.
      TC Bros.
      TC Bros Heavy Duty Oil Tank Mounting Kit For 1982-2003 Sportster Hardtail
      $49.95
      35 reviews
      A pair of TC Bros. metal rods and a set of TC Bros. screws, ideal for constructing a DIY Sissy Bar Kit for your bike.
      A TC Bros. Original DIY Sissy Bar Kit is parked in a garage.
      TC Bros.
      TC Bros. Original DIY Sissy Bar Kit
      $99.95
      19 reviews
      A set of Moto Iron® Sportster Gas Tank Rubber Mounting Kits on a white background for custom applications.
      A set of Moto Iron® Sportster Gas Tank Rubber Mounting Kits on a white background for custom applications.
      Moto Iron®
      Sportster Gas Tank Rubber Mounting Kit
      $28.95
      24 reviews
      A TC Bros. Chrome Weld On Kick Stand for 1-1/8" Frame Tubing handle with a chrome frame on a white background.
      A TC Bros. Chrome Weld On Kick Stand for 1-1/8
      TC Bros.
      TC Bros. Chrome Weld On Kick Stand for 1-1/8" Frame Tubing
      $79.95
      12 reviews
      A TC Bros Holey Battery Box for YTX14AH or 12N14 Series batteries, featuring strategically placed holes for ventilation.
      A TC Bros. Holey Battery Box for YTX14AH or 12N14 Series motorcycle parked in front of a building.
      TC Bros.
      TC Bros Holey Battery Box for YTX14AH or 12N14 Series
      $99.95
      12 reviews
      A black and white picture of a TC Bros. Air Ride Solo Seat Bracket Kit.
      A close up of the TC Bros. Air Ride Solo Seat Bracket Kit, showcasing its adjustability and vibration dampening features.
      TC Bros.
      TC Bros. Air Ride Solo Seat Bracket Kit
      $119.95
      30 reviews
      A TC Bros. Black Weld On Kick Stand for 1-1/4" Frame Tubing on a white surface.
      A motorcycle with a TC Bros. Black Weld On Kick Stand for 1-1/4
      TC Bros.
      TC Bros. Black Weld On Kick Stand for 1-1/4" Frame Tubing
      $79.95
      12 reviews
      A TC Bros Holey Battery Box with dimensions and holes on it.
      A TC Bros Holey Battery Box for 1981-03 Sportster YTX20 or YB16 Series pedal holder with dimensions and a screw.
      TC Bros.
      TC Bros Holey Battery Box for 1981-03 Sportster YTX20 or YB16 Series
      $99.95
      13 reviews
      A steel tube with TC Bros. Extra Frame Tubing 1-1/8" OD x 46" on a white background.
      TC Bros.
      Extra Frame Tubing 1-1/8" OD x 46"
      $24.95
      15 reviews
      A set of TC Bros Passenger Footpeg Kit for Sportster Hardtails bolts and screws for a hardtail frame kit.
      A TC Bros Passenger Footpeg Kit for Sportster Hardtails motorcycle parked in front of a brick wall.
      TC Bros.
      TC Bros Passenger Footpeg Kit for Sportster Hardtails
      $129.95
      1 review
      A TC Bros. Chrome Weld On Kick Stand for 1-1/4" Frame Tubing with a TC Bros. Chrome Kickstand Hidden Spring on a white background.
      The motorcycle is equipped with a hidden spring and a TC Bros. Chrome Weld On Kick Stand for 1-1/4
      TC Bros.
      TC Bros. Chrome Weld On Kick Stand for 1-1/4" Frame Tubing
      $79.95
      18 reviews
      A TC Bros. Weld-On Front Solo Seat Pivot / Hinge for Bobbers & Choppers with adjustability and durability, along with nuts and bolts, on a white background.
      A durable TC Bros. metal bracket, with screws and nuts, designed for adjustability.
      TC Bros.
      TC Bros. Weld-On Front Solo Seat Pivot / Hinge for Bobbers & Choppers
      $44.95
      18 reviews
      An AntiGravity Antigravity Lithium Battery - 4 Cell AG-401 - Small Case on a white background.
      AntiGravity
      Antigravity Lithium Battery - 4 Cell AG-401 - Small Case
      $119.95
      A TC Bros. Weld On Rear Fender Mount for Bobbers & Choppers, with universal fit, and easy welding.
      A metal piece with a washer on it that has a universal fit for easy welding, used as a TC Bros. Weld On Rear Fender Mount for Bobbers & Choppers.
      TC Bros.
      Weld On Rear Fender Mount for Bobbers & Choppers by TC Bros.
      $12.95
      37 reviews
      A set of TC Bros. Universal Chopper/Bobber Fender Mounting Strut Kit on a white background, perfect for easy welding.
      A set of TC Bros. Universal Chopper/Bobber Fender Mounting Strut Kit on a white background, perfect for easy welding of choppers and bobbers.
      TC Bros.
      TC Bros. Universal Chopper/Bobber Fender Mounting Strut Kit
      $44.95
      29 reviews
      A set of TC Bros. King & Queen Seat Mounting Kit mount bolts and washers for a metal bracket.
      A set of TC Bros. King & Queen Seat Mounting Kit bolts, nuts, and washers for a metal mount.
      TC Bros.
      TC Bros. King & Queen Seat Mounting Kit
      $39.95
      9 reviews
      A pair of stainless steel TC Bros NPT bungs on a white background.
      Two 1/4 NPT Steel Weld In Petcock Bungs by TC Bros on a white background.
      TC Bros.
      1/4 NPT Steel Weld In Petcock Bungs by TC Bros
      $19.95
      1 review
      A set of TC Bros. screws and washers on a white background.
      TC Bros.
      TC Bros. Weld-on Solo Seat Spring Mounts
      $29.95
      18 reviews
      A TC Bros. Chrome Weld On Kick Stand for 1" Frame Tubing handle on a white background with a hidden spring.
      A motorcycle with a chain on the ground and a TC Bros. Chrome Weld On Kick Stand for 1
      TC Bros.
      TC Bros. Chrome Weld On Kick Stand for 1" Frame Tubing
      $79.95
      12 reviews
      A TC Bros. Solo Seat Mounting Kit (with 3" springs) on a white background, perfect for a chopper or bobber.
      A TC Bros. Solo Seat Mounting Kit (with 3
      TC Bros.
      TC Bros. Solo Seat Mounting Kit (with 3" springs)
      $84.95
      7 reviews
      A TC Bros. Solo Seat Mounting Kit (with 4" Springs), consisting of springs, nuts and bolts, on a white background.
      A set of TC Bros. Solo Seat Mounting Kit (with 4
      TC Bros.
      TC Bros. Solo Seat Mounting Kit (with 4" Springs)
      $84.95
      6 reviews
      A set of TC Bros. brass fittings and hoses, perfect for the TC Bros. DIY Gas Tank Fuel Sight Gauge Kit.
      A set of TC Bros. brass fittings and Tygon hoses is available for DIY enthusiasts.
      TC Bros.
      TC Bros. DIY Gas Tank Fuel Sight Gauge Kit
      $38.95
      5 reviews
      A group of Leather Cushion Washers with 3/8 inch Hole 10 pack, provided by TC Bros., providing paint protection and cushioning on a white background.
      A set of TC Bros. Leather Cushion Washers with 3/8 inch Hole 10 pack, ideal for cushioning and paint protection, on a white background.
      TC Bros.
      Leather Cushion Washers with 3/8 inch Hole 10 pack
      $6.95
      28 reviews
      Two TC Bros 3/8 NPT Steel Weld In Petcock Bungs on a white background.
      Two TC Bros. 3/8 NPT Steel Weld In Petcock Bungs on a white background.
      TC Bros.
      3/8 NPT Steel Weld In Petcock Bungs by TC Bros
      $19.95
      6 reviews
      A TC Bros. black kickstand on a white surface.
      A motorcycle with a hidden spring and a TC Bros. Black Weld On Kick Stand for 1
      TC Bros.
      TC Bros. Black Weld On Kick Stand for 1" Frame Tubing
      $79.95
      2 reviews
      A pair of 1/8 NPT Steel Weld In Bungs by TC Bros on a white background.
      Two 1/8 NPT Steel Weld In Bungs by TC Bros on a background.
      TC Bros.
      1/8 NPT Steel Weld In Bungs by TC Bros
      $18.95
      1 review
      A TC Bros. metal bracket with screws and bolts, featuring a weld-on design.
      A black TC Bros. motorcycle with a TC Bros Battery Box Mounting Kit for Stock Tire '82-'03 Sportster Hardtail mounted tire parked in front of a building.
      TC Bros.
      TC Bros Battery Box Mounting Kit for Stock Tire '82-'03 Sportster Hardtail
      $26.95
      9 reviews
      Two TC Bros. DIY Sissy Bar/ Fender Strut Mounting Bungs - 1/2" ID steel rods on a white background.
      Two TC Bros. DIY Sissy Bar/ Fender Strut Mounting Bungs - 1/2
      TC Bros.
      DIY Sissy Bar/ Fender Strut Mounting Bungs - 1/2" ID
      $34.95
      1 review
      A compact AntiGravity Lithium Battery - 16 Cell AG-1601 - Small Case on a white background.
      AntiGravity
      Antigravity Lithium Battery - 16 Cell AG-1601 - Small Case
      $289.95
      A pair of TC Bros. DIY Sissy Bar/ Fender Strut Mounting Bungs - 5/8" ID on a white background.
      Two TC Bros. DIY Sissy Bar/ Fender Strut Mounting Bungs - 5/8
      TC Bros.
      DIY Sissy Bar/ Fender Strut Mounting Bungs - 5/8" ID
      $34.95
      A metal hook on a white background with TC Bros Bolt On 3/4 Ignition Switch Mounting Tabs.
      A diagram showing the dimensions of an installation hole for a Bolt On 3/4 Ignition Switch Mounting Tab by TC Bros.
      TC Bros.
      Bolt On 3/4 Ignition Switch Mounting Tab by TC Bros
      $8.95
      14 reviews
      Four Tophat Style Blind Threaded 5/16-18 Steel Bungs by TC Bros on a white background.
      A set of Tophat Style Blind Threaded 5/16-18 Steel Bungs by TC Bros nuts and bolts.
      TC Bros.
      Tophat Style Blind Threaded 5/16-18 Steel Bungs by TC Bros
      $21.95
      A pair of TC Bros. stainless steel bolts and nuts for TC Bros Passenger Footpeg Kit for Sportster Hardtails (No Pegs) on a hardtail frame kit.
      A TC Bros Passenger Footpeg Kit for Sportster Hardtails (No Pegs) motorcycle parked in front of a brick wall.
      TC Bros.
      TC Bros Passenger Footpeg Kit for Sportster Hardtails (No Pegs)
      $89.95
      2 reviews
      A set of TC Bros. Solo Seat Mounting Kit (with 5" springs), nuts and bolts on a white background.
      A set of TC Bros. Solo Seat Mounting Kit (with 5
      TC Bros.
      TC Bros. Solo Seat Mounting Kit (with 5" springs)
      $84.95
      4 reviews
      Four TC Bros stainless steel threaded bungs mounted on a white background.
      Four TC Bros stainless steel nuts used to mount a bike on a white background.
      TC Bros.
      Steel Bungs 3/8-16 Threaded 1/2 inch Long by TC Bros
      $18.95
      2 reviews
      A TC Bros. black kickstand on a white surface.
      TC Bros.
      TC Bros. Black Weld On Kick Stand for 1-1/8" Frame Tubing
      $79.95
      9 reviews
      A set of TC Bros DIY 5 inch Pill Style Universal Chopper Oil Tank Kit and fittings for a custom chopper/bobber oil tank.
      A **TC Bros DIY 5 inch Pill Style Universal Chopper Oil Tank Kit** consisting of a set of stainless steel parts ideal for custom chopper/bobber motorcycles.
      TC Bros.
      TC Bros DIY 5 inch Pill Style Universal Chopper Oil Tank Kit
      $119.95
      6 reviews
      A TC Bros. Rigid Solo & Cobra Seat Mounting Kit from TC Bros. used to mount a seat.
      A TC Bros. metal bracket with bolts and nuts on a white background for mounting the Rigid Solo & Cobra Seat Mounting Kit.
      TC Bros.
      TC Bros. Rigid Solo & Cobra Seat Mounting Kit
      $39.95
      3 reviews
      Four TC Bros stainless steel nuts on a white background, perfect for bike mounting.
      TC Bros Steel Bungs 5/16-18 Threaded 1/2 inch Long for bike mount.
      TC Bros.
      Steel Bungs 5/16-18 Threaded 1/2 inch Long by TC Bros
      $18.95
      5 reviews
      Four Weld On Steel Mounting Tabs Vintage Style 6 by TC Bros tabs on a white background.
      TC Bros Weld On Steel Mounting Tabs Vintage Style 6 now offers American made mounting tabs, giving your projects a vintage look.
      TC Bros.
      Weld On Steel Mounting Tabs Vintage Style 6 by TC Bros
      $13.95
      4 reviews
      Four Tophat Style Blind Threaded 3/8-16 Steel Bungs by TC Bros on a white background, ensuring a leak free mount.
      TC Bros offers a leak-free mount, with their Tophat Style Blind Threaded 3/8-16 Steel Bungs by TC Bros nut and bolt set.
      TC Bros.
      Tophat Style Blind Threaded 3/8-16 Steel Bungs by TC Bros
      $21.95
      7 reviews
      Four Counterbore Steel Bungs for 3/8 Socket Head Bolts by TC Bros on a white background provide a mounting solution for bike mount.
      Four Counterbore Steel Bungs for 3/8 Socket Head Bolts by TC Bros., serving as a mounting solution with 3/8-16 threaded bungs.
      TC Bros.
      Counterbore Steel Bungs for 3/8 Socket Head Bolts by TC Bros
      $19.95
      2 reviews
      A set of TC Bros. 5/16-18 Threaded Bungs Kit, CNC Machined From 1018 Cold Rolled Steel, on a white background.
      TC Bros.
      TC Bros. 5/16-18 Threaded Bungs Kit
      $19.95
      2 reviews
      A TC Bros. custom chopper/bobber TC Bros. Battery Box, made of metal, with a pair of blades.
      A metal box with a piece of metal on top, customized for a TC Bros. Battery Box (fits stock XS650 battery 12N14) or XS650 battery.
      TC Bros.
      TC Bros. Battery Box (fits stock XS650 battery 12N14)
      $49.95
      2 reviews
      A set of Heavy Duty Gas Tank Rubber Mounting Kit brackets and screws by TC Bros for welding.
      A pair of Heavy Duty Gas Tank Rubber Mounting Kit bolts by TC Bros on a white background.
      TC Bros.
      Heavy Duty Gas Tank Rubber Mounting Kit by TC Bros
      $42.95
      3 reviews
      A TC Bros Weld On Single Hole Rear Fender Mount for Bobbers & Choppers on a white background.
      A TC Bros Weld On Single Hole Rear Fender Mount for Bobbers & Choppers with a washer on it.
      TC Bros.
      Weld On Single Hole Rear Fender Mount for Bobbers & Choppers by TC Bros.
      $9.95
      A group of TC Bros threaded steel bungs cylinders.
      Several TC Bros threaded metal cylinders with a nut made of Steel Bungs 3/8-16 Threaded 1 inch Long by TC Bros, each measuring 1 inch long.
      TC Bros.
      Steel Bungs 3/8-16 Threaded 1 inch Long by TC Bros
      $19.95
      1 review
      A small hole in a piece of black plastic has been modified for the Moto Iron® 1/4" NPT Angled Petcock Bung.
      A Moto Iron® 1/4
      Moto Iron®
      1/4" NPT Angled Petcock Bung
      $14.95
      A TC Bros. Solo Seat Mounting Kit (with 3" Torsion Springs), including bolts, nuts, washers and Torsion Springs, for a motorcycle.
      A TC Bros. Solo Seat Mounting Kit (with 3
      TC Bros.
      TC Bros. Solo Seat Mounting Kit (with 3" Torsion Springs)
      $84.95
      4 reviews
      Fabrication Parts for Harley Big Twin Custom Builds. The Big Twin Fabrication Parts collection at TC Bros is your go-to source for the essential components needed to create one-of-a-kind Harley-Davidson Big Twin motorcycles. This category includes a wide range of builder-friendly products, such as weld-on brackets, mounting tabs, and DIY-friendly kits, all crafted to help you bring your custom vision to life. Designed for Softails, Dynas, and Touring models, these parts are built with precision and durability to meet the demands of professional fabricators and garage builders alike. With TC Bros' industry-leading fabrication components, you can trust your build will be as functional as it is head-turning.