Big Twin Air Intake & Fuel System

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      A disassembled TC Bros. Chrome Louvered Air Cleaner for HD CV Carbs & EFI with a chrome cover, red filter element, black mounting base, and hardware including screws and bolts—perfect for Harley Davidson Big Twin and Sportster models.
      A disassembled TC Bros. Chrome Louvered Air Cleaner for HD CV Carbs & EFI with a chrome cover, red filter element, black mounting base, and hardware including screws and bolts—perfect for Harley Davidson Big Twin and Sportster models.
      TC Bros.
      TC Bros. Chrome Louvered Air Cleaner for HD CV Carbs & EFI
      $62.95
      170 reviews
      TC Bros. offers TC Bros. e-gift cards for motorcycle enthusiasts.
      TC Bros.
      TC BROS. GIFT CARD
      from $10.00
      Harley-Davidson aftermarket carburetor filter kit with TC Bros Breather Bolts For 1991-2022 Sportster & EVO Big Twin for improved crankcase venting.
      A close up of a motorcycle with TC Bros Breather Bolts For 1991-2022 Sportster & EVO Big Twin aftermarket air cleaner and a red engine.
      TC Bros.
      TC Bros Breather Bolts For 1991-2022 Sportster & EVO Big Twin
      $44.95
      67 reviews
      A TC Bros. Chrome Louvered Air Cleaner for S&S Super E & G Carbs with a chrome cover, a cylindrical red air filter, a black mounting bracket, three bolts, a screw, and a three-spoke wing nut are displayed, perfect for V-Twin engines.
      A TC Bros. Chrome Louvered Air Cleaner for S&S Super E & G Carbs with a chrome cover, a cylindrical red air filter, a black mounting bracket, three bolts, a screw, and a three-spoke wing nut are displayed, perfect for V-Twin engines.
      TC Bros.
      TC Bros. Chrome Louvered Air Cleaner for S&S Super E & G Carbs
      $62.95
      47 reviews
      The Vance & Hines FP4 Fuelpak Tuner M8 Touring/Trike/Softail incl. CVO '21-'23 is designed specifically for Harley-Davidson motorcycles.
      The Vance & Hines FP4 Fuelpak Tuner M8 Touring/Trike/Softail incl. CVO '21-'23 is designed specifically for Harley-Davidson motorcycles.
      Vance & Hines
      Vance & Hines FP4 Fuelpak Tuner M8 Touring/Trike/Softail incl. CVO '21-'23
      $459.99
      2 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
      The TC Bros. Black Louvered Air Cleaner for Bendix Zenith & Keihin Butterfly Carbs includes a filter, cover, mounting plate, and fasteners, all set against a white background.
      The TC Bros. Black Louvered Air Cleaner for Bendix Zenith & Keihin Butterfly Carbs includes a filter, cover, mounting plate, and fasteners, all set against a white background.
      TC Bros.
      TC Bros. Black Louvered Air Cleaner for HD CV Carbs & EFI
      $62.95
      A durable TC Bros. Reserve Fuel Bottle with the word texas on it.
      A durable TC Bros. Reserve Fuel Bottle on a white background.
      TC Bros.
      TC Bros. Reserve Fuel Bottle
      $19.95
      17 reviews
      The Kreem Gas Tank Sealer Kit is a kit designed to prevent internal rust and seal fuel tanks.
      Kreem
      Kreem Gas Tank Sealer Kit
      $54.95
      10 reviews
      A chrome air filter, the Arlen Ness Big Suckerâ„¢ Stage 1 Air Filter Kit - '01-'17 Twin Cam EFI & '99-'06 CV Carb - Chrome, on a white background.
      An Arlen Ness Big Suckerâ„¢ Stage 1 Air Filter Kit - '01-'17 Twin Cam EFI & '99-'06 CV Carb - Chrome for a motorcycle.
      Arlen Ness
      Big Suckerâ„¢ Stage 1 Air Filter Kit - '01-'17 Twin Cam EFI & '99-'06 CV Carb - Chrome
      $219.95
      Motorcycle fuel management system with two connected oxygen sensors and integrated ThunderMax ECM with Integral Auto Tune System for Harley M8 Softail 21-24.
      Motorcycle fuel management system with two connected oxygen sensors and integrated ThunderMax ECM with Integral Auto Tune System for Harley M8 Softail 21-24.
      ThunderMax
      ThunderMax ECM With Integral Auto Tune System For Harley M8 Softail 21-24
      $1,170.95
      The Vance & Hines FP4 Fuelpak Tuner for 2011-2022 Harley is a game-changer for Harley-Davidson models, providing live sensor data for optimal performance.
      The Vance & Hines FP4 Fuelpak Tuner for 2011-2022 Harley is a game-changer for Harley-Davidson models, providing live sensor data for optimal performance.
      Vance & Hines
      Vance & Hines FP4 Fuelpak Tuner for 2011-2022 Harley
      $459.99
      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 ThunderMax ECM With Auto Tune Closed Loop System For Harley 2014-2020 power supply with two wires attached to it.
      A set of ThunderMax ECM With Auto Tune Closed Loop System wires and cables for a Harley 2014-2020 car.
      ThunderMax
      ThunderMax ECM With Auto Tune Closed Loop System For Harley 2014-2020
      $1,088.95
      Two TC Bros breather bolts and washers on a white background.
      A pair of TC Bros Breather Bolts For 1991-2022 Sportster & EVO Big Twin - Black on a white background.
      TC Bros.
      TC Bros Breather Bolts For 1991-2022 Sportster & EVO Big Twin - Black
      $49.95
      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. Choke Relocation Kit with bolts and screws for the highest quality Harley Davidson Keihin CV Carburetors.
      A close up of the TC Bros. Choke Relocation Kit for Harley Davidson CV Carburetors, the highest quality air filter on a motorcycle.
      TC Bros.
      TC Bros. Choke Relocation Kit for Harley Davidson CV Carburetors
      $19.95
      37 reviews
      A Biker's Choice Keihin CV Carb Rebuild Kit Fits Sportster 88-06, Big Twin 90-06 with gaskets and seals.
      Biker's Choice
      Keihin CV Carb Rebuild Kit Fits Sportster 88-06, Big Twin 90-06
      $24.95
      7 reviews
      A set of TC Bros breather bolts for all Harley Twin Cam Engines, including crankcase venting.
      TC Bros Breather Bolts For all Harley Twin Cam Engines by TC Bros. aftermarket air cleaners.
      TC Bros.
      TC Bros Breather Bolts For all Harley Twin Cam Engines
      $44.95
      21 reviews
      A Moto Iron® Cam Lock Gas Cap on a white background.
      A close up of a motorcycle with a red and black paint job featuring the Moto Iron® Cam Lock Gas Cap, a chrome plated steel vented gas cap.
      Moto Iron®
      Cam Lock Gas Cap
      $14.95
      21 reviews
      An Arlen Ness Big Suckerâ„¢ Stage 1 Air Filter Kit - '01-'17 Twin Cam EFI & '99-'06 CV Carb - Black on a white background.
      The Big Suckerâ„¢ Stage 1 Air Filter Kit - '01-'17 Twin Cam EFI & '99-'06 CV Carb - Black by Arlen Ness is the perfect upgrade for your Harley-Davidson motorcycle.
      Arlen Ness
      Big Suckerâ„¢ Stage 1 Air Filter Kit - '01-'17 Twin Cam EFI & '99-'06 CV Carb - Black
      $219.95
      A Moto Iron® 1/4" Fuel Valve Petcock 90 Degree with a red handle on a white background.
      A close up of a Moto Iron® 1/4
      Moto Iron®
      1/4" Fuel Valve Petcock 90 Degree
      $19.95
      25 reviews
      A ThunderMax ECM with Autotune closed-loop system for Harley 2001-2010, a black box with two wires attached to it.
      A set of ThunderMax ECM With Autotune Closed Loop System For Harley 2001-2010 wires and cables for a car.
      ThunderMax
      ThunderMax ECM With Autotune Closed Loop System For Harley 2001-2010
      $1,088.95
      A ThunderMax ECM With Autotune Closed Loop System For Harley 2008-2013 with two wires attached to it.
      ThunderMax
      ThunderMax ECM With Autotune Closed Loop System For Harley 2008-2013
      $1,088.95
      A Prism Supply Petcock - 90° 1/4" NPT - Stainless on a white background from Prism Supply.
      A Prism Supply Petcock - 90° 1/4
      Prism Supply
      Prism Supply Petcock - 90° 1/4" NPT - Stainless
      $129.99
      A device with a yellow cable attached to it, designed for optimal performance and fuel tuning, known as the Dynojet Power Vision.
      A set of Dynojet Power Vision 3 06-13 Touring, 06-10 Softail, 06-11 Dyna & 07-13 Sportster J1850 ECM cables and a remote control for a car, serving as fuel tuner to optimize the car's performance with Dynojet.
      Dynojet
      Dynojet Power Vision 3 06-13 Touring, 06-10 Softail, 06-11 Dyna & 07-13 Sportster J1850 ECM
      $477.76
      The TC Bros. Black Louvered Air Cleaner for S&S Super E & G Carbs is a black air filter assembly kit by TC Bros., featuring a chrome louvered air cleaner, cylindrical filter, mounting bracket, screws, and a star-shaped wing nut.
      The TC Bros. Black Louvered Air Cleaner for S&S Super E & G Carbs is a black air filter assembly kit by TC Bros., featuring a chrome louvered air cleaner, cylindrical filter, mounting bracket, screws, and a star-shaped wing nut.
      TC Bros.
      TC Bros. Black Louvered Air Cleaner for S&S Super E & G Carbs
      $62.95
      The Vance & Hines FP4 Fuelpak Tuner for Pre-2014 Harley (see fitment chart) is a device that provides live sensor data and is compatible with Harley-Davidson models.
      Vance & Hines
      Vance & Hines FP4 Fuelpak Tuner for Pre-2014 Harley (see fitment chart)
      $459.99
      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
      A Prism Supply sieve with three holes for sorting and filtering.
      A Prism Supply sieve with three holes for sorting and filtering.
      Prism Supply
      Prism Supply Bristol Breather - S&S Super E Polished
      $60.00
      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 Pangor Cycles All Thumbs Idle Speed Screw For S&S Super E / G Carburetor - Brass, made in USA, on a white background.
      A close up of a Pangor Cycles All Thumbs Idle Speed Screw For S&S Super E / G Carburetor - Brass made in USA.
      Pangor Cycles
      Pangor Cycles All Thumbs Idle Speed Screw For S&S Super E / G Carburetor - Brass
      $18.95
      33 reviews
      A Prism Supply Petcock - 90° 1/4" NPT - Brass fitting on a white background.
      A Prism Supply Petcock - 90° 1/4
      Prism Supply
      Prism Supply Petcock - 90° 1/4" NPT - Brass
      $109.99
      A set of parts for a motorcycle, including a carburetor and S&S® Teardrop Air Cleaner Kit For 1993-'06 HD® Big Twins with Stock CV carburetors - Chrome from S&S Cycle.
      S&S Cycle
      S&S® Teardrop Air Cleaner Kit For 1993-'06 HD® Big Twins with Stock CV carburetors - Chrome
      $359.95
      A pink and white TC Bros. Finned Raw Air Cleaner HD CV Carbs & EFI, with a vintage style, on a white background.
      A close up of a TC Bros. Finned Raw Air Cleaner HD CV Carbs & EFI vintage style motorcycle with a red and black engine.
      TC Bros.
      TC Bros. Finned Raw Air Cleaner HD CV Carbs & EFI
      $99.95
      10 reviews
      A Moto Iron® 1/4" NPT Male Fuel Valve Petcock with a red handle on it, featuring a stainless steel fuel filter screen.
      A stainless steel Moto Iron® 1/4
      Moto Iron®
      1/4" NPT Male Fuel Valve Petcock
      $34.95
      11 reviews
      A Prism Supply Bristol Breather - S&S Super E Tumbled metal mesh filter on a white background.
      A Prism Supply Bristol Breather - S&S Super E Tumbled metal mesh filter on a white background.
      Prism Supply
      Prism Supply Bristol Breather - S&S Super E Tumbled
      $55.00
      A TC Bros. Finned Black Air Cleaner HD CV Carbs & EFI on a white background.
      A TC Bros. Finned Black Air Cleaner HD CV Carbs & EFI motorcycle parked in front of a barn.
      TC Bros.
      TC Bros. Finned Black Air Cleaner HD CV Carbs & EFI
      $109.95
      10 reviews
      A vintage style TC Bros. Finned Polished Air Cleaner S&S Super E & G Carbs on a white background.
      A TC Bros. Finned Polished Air Cleaner for a Harley Davidson motorcycle.
      TC Bros.
      TC Bros. Finned Polished Air Cleaner S&S Super E & G Carbs
      $129.95
      6 reviews
      A TC Bros. Finned Polished Air Cleaner HD CV Carbs & EFI on a white background.
      Harley-Davidson motorcycle enthusiasts can now customize their bikes with a TC Bros. Finned Polished Air Cleaner HD CV Carbs & EFI to enhance the classic aesthetic.
      TC Bros.
      TC Bros. Finned Polished Air Cleaner HD CV Carbs & EFI
      $129.95
      4 reviews
      A TC Bros Air Cleaner/Carb Support Bracket for HD Twin Cam Engines with a gasket on a white background.
      A black TC Bros Air Cleaner/Carb Support Bracket for HD Twin Cam Engines mount for a gasket and a gasket designed specifically for an TC Bros Air Cleaner/Carb Support Bracket for HD Twin Cam Engines.
      TC Bros.
      TC Bros Air Cleaner/Carb Support Bracket for HD Twin Cam Engines
      $29.95
      8 reviews
      A slim Prism Supply Bristol Breather - CV Polished mesh filter cover on a white background.
      A slim Prism Supply Bristol Breather - CV Polished mesh filter cover on a white background.
      Prism Supply
      Prism Supply Bristol Breather - CV Polished
      $60.00
      A S&S Cycle brass screw on a white background. The S&S Choke Knob Enrichment Device For Super E & G Carburetors is an enrichment device used in carburetors, specifically S&S Super E.
      A brass screw for the S&S Choke Knob Enrichment Device For Super E & G Carburetors on a white background.
      S&S Cycle
      S&S Choke Knob Enrichment Device For Super E & G Carburetors
      $44.95
      16 reviews
      A Prism Supply Bristol Breather - CV Tumbled metal filter cover on a white background.
      A Prism Supply Bristol Breather - CV Tumbled metal filter cover on a white background.
      Prism Supply
      Prism Supply Bristol Breather - CV Tumbled
      $55.00
      An image of a TC Bros. Air Cleaner/Carb Support Bracket for 1989-1999 Evo Big Twin CV and a gasket on a white background.
      TC Bros.
      TC Bros. Air Cleaner/Carb Support Bracket for 1989-1999 Evo Big Twin CV
      $29.95
      10 reviews
      A TC Bros. Gas Tank Sight Glass Kit (with steel weld in bung) and a black nut on a white background in an oil tank.
      TC Bros.
      TC Bros. Gas Tank Sight Glass Kit (with steel weld in bung)
      $29.95
      2 reviews
      An air filter kit with a Harley Sportster & Big Twin CV Carb and a HardDrive Chrome Mesh Air Cleaner.
      HardDrive
      Chrome Mesh Air Cleaner - CV Carb - Harley Sportster & Big Twin
      $85.69
      An S&S Cycle Super G Carburetor for Sportster Models.
      An S&S Cycle Super G Carburetor with bolts and nuts on a white background.
      S&S Cycle
      Super G Carburetor
      $499.95
      A Wyatt Gatling 1/4" 90 Degree Petcock With Screen Filter with a red handle on a white background.
      Wyatt Gatling
      1/4" 90 Degree Petcock With Screen Filter
      $29.04
      A Mikuni HSR to CV Air Cleaner Adapter HS42/001-K for HSR 42/45 Carbs gasket and ring by Biker's Choice.
      A Mikuni HSR to CV Air Cleaner Adapter HS42/001-K for HSR 42/45 Carbs by Biker's Choice threaded end stainless steel pipe fitting.
      Biker's Choice
      Mikuni HSR to CV Air Cleaner Adapter HS42/001-K for HSR 42/45 Carbs
      $29.00
      1 review
      A set of Mid-USA brass screws and Mid-USA Keihin CV Carb jet kit for Sportster/Big Twin tuners kit for a gun.
      Mid-USA
      Keihin CV Carb jet kit for Sportster/Big Twin
      $81.45
      3 reviews
      A HardDrive Chrome Mesh Air Cleaner with screws and nuts, combined with vintage styling.
      HardDrive
      Chrome Mesh Air Cleaner - S&S Carbs
      $74.95
      Two TC Bros Breather Bolts For all Harley Twin Cam Engines - Black and washers on a white background.
      Two TC Bros Breather Bolts For all Harley Twin Cam Engines - Black and washers on a white background.
      TC Bros.
      TC Bros Breather Bolts For all Harley Twin Cam Engines - Black
      $49.95
      An image of a Moto Iron® 13/16" Female Fuel Valve Petcock 90 Degree with a white background.
      A Moto Iron® 13/16
      Moto Iron®
      13/16" Female Fuel Valve Petcock 90 Degree
      $27.95
      7 reviews
      A Moto Iron® Straight Spigot 3/8" NPT Male Fuel Valve Petcock with a wooden handle and a show chrome finish on a white background.
      A Moto Iron® Straight Spigot 3/8
      Moto Iron®
      Straight Spigot 3/8" NPT Male Fuel Valve Petcock
      $27.95
      2 reviews
      A Moto Iron® flexible fuel tubing made of plasticized PVC, suitable for gasoline or alcohol type fuel, on a white background.
      Moto Iron®
      1/4" Translucent "Smoke" Black Fuel Line 3ft
      $8.95
      5 reviews
      A S&S Cycle stainless steel cup with bolts.
      S&S Cycle
      S&S Velocity Stack - Super E & G Carburetor - 2.5
      $183.95
      A set of parts for a motorcycle, featuring an S&S Cycle Teardrop Air Cleaner Kit for 2001-'17 HD Stock EFI Big Twin alongside a carburetor for improved performance.
      S&S Cycle
      S&S® Teardrop Air Cleaner Kit for 2001-'17 HD® Stock EFI Big Twin
      $359.95
      A Drag Specialties In-line Glass Mini Fuel Filter - 1/4 on a white background.
      Drag Specialties
      In-line Glass Mini Fuel Filter - 1/4
      $14.95
      A Moto Iron® chrome-plated steel screw in gas cap on a white background.
      A motorcycle with a Moto Iron® chrome plated steel vented screw in gas cap parked in a garage.
      Moto Iron®
      Screw in Gas Cap
      $14.95
      4 reviews

      Air Intake & Fuel System Upgrades for Harley Big Twins. The Big Twin Air Intake & Fuel System collection at TC Bros is built for riders looking to maximize the performance and efficiency of their Harley-Davidson Big Twin motorcycles. This category includes high-quality air cleaners, carburetor components, and fuel system upgrades designed for models like Softails, Dynas, and Touring bikes. Whether you're chasing more horsepower, smoother throttle response, or a bold custom look, these parts are precision-engineered to deliver. Transform your ride with TC Bros—where performance meets reliability for Harley Big Twin builds.