Holley Performance Carbs & More

Legendary Holley carburetors have powered professional racers to victory for years, and you can bolt the same technology onto your engine. Every Holley carb is built...

Legendary Holley carburetors have powered professional racers to victory for years, and you can bolt the same technology onto your engine. Every Holley carb is built in the USA and 100-percent flow tested for no-hassle, out-of-the-box performance. Holley fuel pumps, fuel injectors, throttle bodies, and EFI system are manufactured using that same proven quality control. Bring a renowned Holley carburetor, fuel pump, or any other high-quality air and fuel system part to your street machine, competition vehicle, boat, or daily driver. Shop Holley at Summit Racing now!

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Holley Fuel Rail Adapter Fittings 534-211

Fitting, Straight, Adapter, -6 AN Male to GM Factory Fuel Line Quick-Connect, 3/4 in. O-Ring Male Port Plug, Aluminum, Black Anodized, Each

Part Number: HLY-534-211

4.5 out of 5 stars ( 2 )

Estimated Ship Date: Today

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Holley Fuel Fittings 34-22

Fittings, Adapter, Inverted Flare to Hose Barb, 90 Degree, Steel, Chrome, 5/8-18 in. Inverted Flare, 3/8 in., Each

Part Number: HLY-34-22

4.33 out of 5 stars ( 12 )

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Holley Fuel Rail Adapter Fittings 534-321

Fittings, Fuel Rail Fitting, Aluminum, Black, 180 Degree, -8 AN Male, -8 AN Female, Each

Part Number: HLY-534-321

5.0 out of 5 stars ( 1 )

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Holley LS Hi-Ram Fuel Rail Adapter Kits 300-230

Fuel Rail Components, LS Hi-Ram, Adapters, CNC Machined, Aluminum, Mounting Hardware, O-rings, Kit

Part Number: HLY-300-230

2.5 out of 5 stars ( 2 )

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Holley Fuel Lines 34-43

Fuel Lines, Braided Flex, Nylon/Rubber, Black Aluminum Fittings, -8 AN, Holley Ultra Series, Kit

Part Number: HLY-34-43

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Holley Fuel Lines 34-48

Fuel Lines, Braided Flex, Steel, Aluminum Black Fittings, -8 AN Male, -8 AN Female, Holley Ultra 4500 HP, Kit

Part Number: HLY-34-48

4.33 out of 5 stars ( 3 )

Estimated Ship Date: Dec 11, 2025 if ordered today

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Estimated Ship Date: Dec 11, 2025 if ordered today

Holley Fuel Lines 34-49

Fuel Lines, Braided Flex, Steel, Aluminum Red/Blue Fittings, -8 AN Male, -8 AN Female, Holley Ultra 4500HP, Kit

Part Number: HLY-34-49

Not Yet Reviewed

Estimated Ship Date: Dec 11, 2025 if ordered today

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Estimated Ship Date: Dec 11, 2025 if ordered today

Holley Fuel Lines 34-46

Fuel Lines, Braided Flex, Stainless, Aluminum, Red/Blue Fittings, -8 AN Male, -8 AN Female, Holley Ultra 4150HP

Part Number: HLY-34-46

Not Yet Reviewed

Estimated Ship Date: Dec 12, 2025 if ordered today

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Estimated Ship Date: Dec 12, 2025 if ordered today

Need It Sooner? We recommend these similar substitute parts:

Summit Racing™ Dual Feed Fuel Lines SUM-220131

4 out of 5 stars ( 4 )

Estimated Ship Date: Today

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Holley Fuel Lines 34-44

Fuel Lines, Braided Flex, Stainless Steel, Aluminum, Black Fittings, -8 AN, Holley Ultra Series, Kit

Part Number: HLY-34-44

4.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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Holley HP Billet Fuel Pressure Regulators 12-880

Fuel Pressure Regulators, HP Billet, Adjustable, 4-65 psi, Return Style, Inline, -6 AN Female O-ring, Aluminum, Black, Clear Anodized, Each

Part Number: HLY-12-880

2.37 out of 5 stars ( 19 )

Estimated Ship Date: Today

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Holley Bypass Fuel Pressure Regulator Kits 12-887KIT

Fuel Pressure Regulators, Bypass Regulator Kit, Return, 4.5-9 psi, Carbureted, Includes Fittings, Gauge, Mounting Bracket, Kit

Part Number: HLY-12-887KIT

3.6 out of 5 stars ( 5 )

Estimated Ship Date: Today

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Holley HP Billet Fuel Pressure Regulators 12-846

Fuel Pressure Regulators, HP Billet, 15 to 65 psi, Inline, Return Style, -8 AN Inlet and Outlet, -6 AN Return, Black Finish, Bracket, Each

Part Number: HLY-12-846

4.82 out of 5 stars ( 11 )

Estimated Ship Date: Today

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Holley Bypass Fuel Pressure Regulator Kits 12-882KIT

Fuel Pressure Regulators, Die-Cast EFI By-Pass, Adjustable, 15-60 psi, Return, Inline, 3/8 in.-NPT, 1/8 in.-NPT, Ports, Fittings, Gauge, Bracket, Kit

Part Number: HLY-12-882KIT

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Holley HP Billet Fuel Pressure Regulators 12-879

Fuel Pressure Regulators, HP Billet, Adjustable, 4-65 psi, Return Style, Inline, 3/8 in.-NPT, Female Thread, Aluminum, Black, Clear Anodized, Each

Part Number: HLY-12-879

3.95 out of 5 stars ( 20 )

Estimated Ship Date: Today

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Holley Bypass Fuel Pressure Regulator Kits 12-880KIT

Fuel Pressure Regulators, HP Billet, Adjustable, 4-65 psi, Return Style, -6 AN Female O-ring, Manifold Fitting, Pressure Gauge, Bracket, Hardware, Kit

Part Number: HLY-12-880KIT

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Holley HP Billet Fuel Pressure Regulators 12-843

Fuel Pressure Regulators, HP Billet, 4.5-9 psi, No Return, -10 AN Inlet, -8 AN Outlets, Aluminum, Black/Clear Anodized, Each

Part Number: HLY-12-843

4.0 out of 5 stars ( 4 )

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Holley HP Billet Fuel Pressure Regulators 12-842

Fuel Pressure Regulators, HP Billet, 4.5 to 9 psi, Inline, Return Style, 3/8 in. NPT, Inlet and Outlet, Idle Bleed, Black Finish, Bracket, Each

Part Number: HLY-12-842

4.43 out of 5 stars ( 7 )

Estimated Ship Date: Today

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Holley Bypass Fuel Pressure Regulator Kits 12-846KIT

Fuel Pressure Regulators, Bypass Regulator, Inline, 15-60 psi, -8 AN Inlet and Outlet, -6 AN Return, Black, Fittings, Gauge, Bracket, Kit

Part Number: HLY-12-846KIT

Not Yet Reviewed

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Holley HP Billet Fuel Pressure Regulators 12-845

Fuel Pressure Regulators, HP Billet, 4.5 to 9 psi, Inline, Return Style, -8 AN Inlet and Outlet, -6 AN Return, Black Finish, Bracket, Each

Part Number: HLY-12-845

4.44 out of 5 stars ( 9 )

Estimated Ship Date: Today

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Holley Bypass Fuel Pressure Regulator Kits 12-840KIT

Fuel Pressure Regulators, Bypass Regulator, Inline, 4.5-9 psi, No Return, 3/8 in. Inlet and Outlet, Black Finish, Fittings, Gauge, Bracket, Kit

Part Number: HLY-12-840KIT

Not Yet Reviewed

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Holley Bypass Fuel Pressure Regulator Kits 12-841KIT

Fuel Pressure Regulators, Bypass Regulator, Inline, 4.5-9 psi, Return Style, 3/8 in. NPT, Inlet and Outlet, Black, Fittings, Gauge, Bracket, Kit

Part Number: HLY-12-841KIT

1.0 out of 5 stars ( 1 )

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Holley Bypass Fuel Pressure Regulator Kits 12-848KIT

Fuel Pressure Regulators, Bypass Regulator, 15-60 psi, -8 AN Return, -10 AN Inlet and Outlet, Black Finish, Fittings, Gauge, Bracket, Kit

Part Number: HLY-12-848KIT

Not Yet Reviewed

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Holley Bypass Fuel Pressure Regulator Kits 12-881KIT

Fuel Pressure Regulators, Die-Cast By-Pass, Adjustable, 4.5-9 psi, Return Style, Inline, 3/8 in.-NPT, 1/8 in.-NPT Ports, Fittings, Gauge, Bracket, Kit

Part Number: HLY-12-881KIT

4.5 out of 5 stars ( 6 )

Estimated Ship Date: Today