Carburetors - Down-leg Booster Type

Holley Aluminum Ultra XP 650 CFM 4-Barrel Carburetor 0-80812BKX

Carburetors, Ultra XP, 650 cfm, 4-barrel, Square Bore, Mechanical Secondaries, Dual Inlet, Shiny and Black Finish, Down-leg Booster, Each

Part Number: HLY-0-80812BKX

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Quick Fuel Street-Q 850 CFM 4-Barrel Carburetor SQ-850

Carburetor, Street-Q, 850 cfm, 4-barrel, Square Bore, Mechanical Secondary, Polished, Each

Part Number: QFT-SQ-850

4.71 out of 5 stars ( 7 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Holley Ultra Double Pumper 850 CFM 4-Barrel Carburetor 0-76850HB

Carburetors, Ultra Double Pumper, 850 cfm, 4-barrel, Square Bore, Electric Choke, Mechanical Secondaries, Dual Inlet, Black and Gray Finish, Each

Part Number: HLY-0-76850HB

Not Yet Reviewed

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Holley Marine Avenger 770 CFM 4-Barrel Carburetor 0-82770

Carburetors, Marine Avenger, 770 cfm, 4-barrel, Square Bore, Electric Choke, Vacuum Secondaries, Dual Inlet, Hard Core Gray, Down-leg Booster, Each

Part Number: HLY-0-82770

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Holley Aluminum Ultra XP 2-Barrel 500 CFM 2-Barrel Carburetor 0-4412HBX

Carburetors, Aluminum Ultra XP, 500 cfm, 2 Barrel, Single Inlet, Gray Anodized, Down-leg Booster, Billet Baseplate and Metering Block, Black, Each

Part Number: HLY-0-4412HBX

Not Yet Reviewed

Estimated Ship Date: Nov 11, 2026 if ordered today

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Estimated Ship Date: Nov 11, 2026 if ordered today

Need It Sooner? We recommend these similar substitute parts:

Holley 2300 500 CFM 2-Barrel Carburetor 0-4412CT

5 out of 5 stars ( 8 )

Estimated Ship Date: Monday 10/26/2026

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Holley Aluminum Ultra XP 750 CFM 4-Barrel Carburetor 0-80803RDX

Carburetors, Ultra XP, 750 cfm, 4-barrel, Square Bore and Dominator Mounting, Mechanical Secondaries, Dual Inlet, Shiny and Red Finish, Each

Part Number: HLY-0-80803RDX

5.0 out of 5 stars ( 6 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Quick Fuel Q-Series 4-Barrel 750 CFM 4-Barrel Carburetor Q-750-B2

Carburetor, Gasoline, 4150, 750 cfm, 4-Barrel, Down-Leg, For Dual Carbureted Blower Engines, Each

Part Number: QFT-Q-750-B2

4.33 out of 5 stars ( 6 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Holley Aluminum Street Avenger 870 CFM 4-Barrel Carburetor 0-83870

Carburetors, Street Avenger, 870 cfm, 4-barrel, Square Bore, Electric Choke, Vacuum Secondaries, Dual Inlet, Shiny Finish, Ford Kickdown, Each

Part Number: HLY-0-83870

4.5 out of 5 stars ( 4 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Holley 2300 500 CFM 2-Barrel Carburetor 0-4412C

Carburetors, Model 2300, 500 cfm, 2-Barrel, Manual Choke, Single Inlet, Gold Finish, Down-leg Booster, Ford Kickdown, Each

Part Number: HLY-0-4412C

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Holley Aluminum Ultra XP 650 CFM 4-Barrel Carburetor 0-80802HBX

Carburetors, Ultra XP, 650 cfm, 4-barrel, Square Bore and Dominator Mounting, Mechanical Secondaries, Dual Inlet, Grey and Black Finish, Each

Part Number: HLY-0-80802HBX

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Proform Black Race Series 750 CFM 4-Barrel Carburetor 67302

Proform Black Race Series 750 CFM 4-Barrel Carburetor 67302

Carburetor, Race Series, 750 cfm, 4-Barrel, Dual Inlet, Black/Purple, Each

Part Number: PRO-67302

5.0 out of 5 stars ( 11 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Holley 2300 Marine 500 CFM 2-Barrel Carburetor 0-80402-2

Carburetors, Model 2300, Marine, 500 cfm, 2-Barrel, Electric Choke, Single Inlet, Hard Core Gray Finish, Down-leg Booster, Each

Part Number: HLY-0-80402-2

Not Yet Reviewed

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Quick Fuel Performance Marine 850 CFM 4-Barrel Carburetor M-850

Carburetor, Marine, 850 cfm, Mechanical Secondary, Electric Choke, 4-Barrel, Square Bore, Dual Feed, Black, Each

Part Number: QFT-M-850

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Quick Fuel Black Diamond Marine Series 650 CFM 4-Barrel Carburetor M-650

Carburetor, Q-Series Marine, 650 cfm, Mechanical Secondary, Electric Choke, Satin Black, Dual Inlet, Each

Part Number: QFT-M-650

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Proform Race Series 850 CFM 4-Barrel Carburetor 67201-ALC

Carburetor, Alcohol, Proform Race Series, Universal, 850 cfm, 4-Barrel, Dual Inlet, Tumble Polished, Each

Part Number: PRO-67201-ALC

Not Yet Reviewed

Estimated Ship Date: Nov 16, 2026 if ordered today

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Estimated Ship Date: Nov 16, 2026 if ordered today

Quick Fuel Q-Series 4-Barrel 850 CFM 4-Barrel Carburetor Q-850-E85

Carburetor, E-85, 4150, 850 cfm, 4-Barrel, Down-Leg, Mechanical, Dual Inlet, Each

Part Number: QFT-Q-850-E85

4.0 out of 5 stars ( 4 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Quick Fuel Brawler Race Series 750 CFM 4-Barrel Carburetor BR-67302

Carburetor, Brawler Black Race Series, 750 cfm, Mechanical Secondary, 4-Barrel, Square Bore

Part Number: QFT-BR-67302

5.0 out of 5 stars ( 11 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Quick Fuel Street-Q 950 CFM 4-Barrel Carburetor SQ-950

Carburetor, Street-Q, 950 cfm, 4-barrel, Square Bore, Mechanical Secondary, Polished, Each

Part Number: QFT-SQ-950

4.83 out of 5 stars ( 6 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Quick Fuel Q-Series 4-Barrel 850 CFM 4-Barrel Carburetor Q-850-B2

Carburetor, Gasoline, 4150, 850 cfm, 4-Barrel, Down-Leg, For Dual Carbureted Blower Engines, Each

Part Number: QFT-Q-850-B2

Not Yet Reviewed

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Quick Fuel Q-Series 2-Barrel Circle Track 500 CFM 2-Barrel Carburetor Q-500-CT

Carburetor, Gasoline, Holley 2-Barrel Flange, 500 cfm, 2-Barrel, Down-Leg, Circle Track, Each

Part Number: QFT-Q-500-CT

3.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Quick Fuel Q-Series 4-Barrel 750 CFM 4-Barrel Carburetor Q-750-E85

Carburetor, E-85, Q-Series, 750 cfm, 4-Barrel, Mechanical, Down-Leg, Each

Part Number: QFT-Q-750-E85

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Proform Race Series 1,050 CFM 4-Barrel Carburetor 67209-ALC

Carburetor, Alcohol, Proform Race Series, Universal, 1,050 cfm, 4-Barrel, Dual Inlet, Tumble Polished, Each

Part Number: PRO-67209-ALC

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Quick Fuel Q-Series 4-Barrel 850 CFM 4-Barrel Carburetor Q-850-A

Carburetor, Alcohol, 4150, 850 cfm, 4-Barrel, Down-Leg, Billet Metering Blocks, Dual Inlet, Each

Part Number: QFT-Q-850-A

3.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Holley Aluminum Ultra XP 750 CFM 4-Barrel Carburetor 0-80813BKX

Carburetors, Ultra XP, 750 cfm, 4-barrel, Square Bore, Mechanical Secondaries, Dual Inlet, Shiny and Black Finish, Down-leg Booster, Each

Part Number: HLY-0-80813BKX

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air

Quick Fuel Q-Series 4-Barrel 950 CFM 4-Barrel Carburetor Q-950-B2

Carburetor, Gasoline, 4150, 950 cfm, 4-Barrel, Down-Leg, For Dual Carbureted Blower Engines, Each

Part Number: QFT-Q-950-B2

Not Yet Reviewed

Estimated Ship Date: Monday 10/26/2026 if shipped by air

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Estimated Ship Date: Monday 10/26/2026 if shipped by air