Holley Aluminum Ultra XP Carburetors

4.52 out of 5 stars 42 Customer Reviews

Holley's Ultra XP carburetors are up to 38 percent lighter than their traditional carbs, offer 20 percent greater fuel capacity, and include a host of other feature

Holley's Ultra XP carburetors are up to 38 percent lighter than their traditional carbs, offer 20 percent greater fuel capacity, and include a host of other features. One of the main perks is an integrated idle bypass valve that allows for idle adjustments while maintaining the proper throttle-plate-to-transfer-slot relationship. You'll also get all-aluminum construction, fully tunable billet metering blocks, billet base plate, adjustable secondary linkage, and knurled (hand-adjustable) curb idle screws. Enjoy the ultimate in square-bore race carbs; order the Ultra XP carburetor with options best suited for your race application! Some of the many other features include: * Your choice of several finishes and CFM ratings (from 600 to 950) * Contoured Venturi inlet offers balanced airflow for increased hp * Dual accelerator pumps provide the perfect amount of fuel, from idle to full-throttle * Clear sight windows on both sides of bowls for safe and easy fuel level adjustments * -8 AN (O-ringed) inlet threads offer a large variety of plumbing options from either side * Mechanical secondaries for perfect off-the-line launches * 100-percent wet-flow tested by Holley technicians

Results 1 - 12 of 12

Holley Aluminum Ultra XP 950 CFM 4-Barrel Carburetor 0-80805HBX

Carburetors, Ultra XP, 950 cfm, 4-barrel, Square Bore and Dominator Mounting, Mechanical Secondaries, Dual Inlet, Gray and Black Finish, Each

Part Number: HLY-0-80805HBX

4.17 out of 5 stars ( 6 )

Estimated Ship Date: Today

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Holley Aluminum Ultra XP 850 CFM 4-Barrel Carburetor 0-80804HBX

Carburetors, Ultra XP, 850 cfm, 4-barrel, Square Bore and Dominator Mounting, Mechanical Secondaries, Dual Inlet, Gray and Black Finish, Each

Part Number: HLY-0-80804HBX

4.33 out of 5 stars ( 6 )

Estimated Ship Date: Today

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

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

Part Number: HLY-0-80803HBX

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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Holley Aluminum Ultra XP 850 CFM 4-Barrel Carburetor 0-80804BKX

Carburetors, Ultra XP, 850 cfm, 4-barrel, Square Bore and Dominator Mounting, Mechanical Secondaries, Dual Inlet, Shiny and Black Finish, Each

Part Number: HLY-0-80804BKX

4.4 out of 5 stars ( 5 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

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

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

Part Number: HLY-0-80803BKX

4.5 out of 5 stars ( 8 )

Estimated Ship Date: Today

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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: Today

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Estimated Ship Date: Today

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 ( 5 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Holley Aluminum Ultra XP 950 CFM 4-Barrel Carburetor 0-80805BKX

Carburetors, Ultra XP, 950 cfm, 4-barrel, Square Bore and Dominator Mounting, Mechanical Secondaries, Dual Inlet, Shiny and Black Finish, Each

Part Number: HLY-0-80805BKX

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

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

Not Yet Reviewed

Estimated Ship Date: Today

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Holley Aluminum Ultra XP 950 CFM 4-Barrel Carburetor 0-80845HBX

Carburetors, Ultra XP, 950 cfm, E85 Fuel, 4-barrel, Square Bore and Dominator Mounting, Mechanical Secondary, Dual Inlet, Gray Finish, Each

Part Number: HLY-0-80845HBX

4.2 out of 5 stars ( 5 )

Estimated Ship Date: Jul 21, 2025 if ordered today

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Estimated Ship Date: Jul 21, 2025 if ordered today

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

Not Yet Reviewed

Estimated Ship Date: Today

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

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

Part Number: HLY-0-80802RDX

Not Yet Reviewed

Estimated Ship Date: Today

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