Holley Ultra Dominator Carburetor - 1250 CFM 4500 Series - Hard Core Gray w/ Black Metering Blocks & Base Plate

1250 CFM Gen 3 Ultra Dominator Carburetor. Features:

ULTRA light all aluminum construction saves 3.8 lbs.

New or modified fuel lines are required (if replacing existing Holley Dominator 4500 series carburetor - previous bowl machining was 7/8-20, Aluminum Ultra Dominator carburetors come assembled with -6AN to SAE 8 port fittings). Center to center fuel inlet measurement is now 11.5"

Hard Core Gray with black anodized billet aluminum metering block and booster inserts

Designed for use on Drag race, Pro Street, or any high horsepower engines

Calibrations optimized for today's larger race engines and new fuels

Fully machined from venturii throat to throttle bore for predictable & repeatable performance

Integrated idle bypass valve allows for adjustment of idle while maintaining correct throttle plate to transfer slot relationship

12 hole billet booster inserts for superior atomization and crisp throttle response

Metering blocks feature improved durability, true gasket sealing and fully adjustable (emulsion bleeds, power valve channel restrictors & idle feed restrictors)

Dual 50cc accelerator pumps provide the perfect amount of fuel from idle to full throttle

Fuel bowls provide 20% more fuel capacity while controlling slosh with internal baffling

Clear sight windows on both sides of bowls for easy and safe fuel level adjustments

Built in drain plug in front center of bowl provides easy access to empty contents of bowl

-8 (o-ringed) inlet threads offer a large variety of plumbing options and can be plumbed from either side

Factory ready TPS mounting points for use with data acquisition systems (Holley TPS P/N 534-214 available)

Knurled (hand adjustable) primary and secondary curb idle screws allow for easy idle adjustment without the use of tools

Contoured hex head squirter screws for streamlined airflow

Product Description:

Carburetor

Gen 3 Ultra Dominator

Model 4500

4-Barrel

1250 CFM

Dominator Flange

No Choke

Mechanical Secondary

Dual Inlet

Aluminum

Black Anodized / Gray

Sold Individually

For over a century Holley has driven the cutting edge of fuel-system design. That work continues today through Holley’s market-leading EFI products as well as through Holley’s family of best-in-industry brands. Top brands like MSD, Flowmaster, Hurst, Accel, and many more make up the industry’s leading offering of enthusiast-driven products to deliver robust, complete performance solutions for builders, racers, and drivers. From propelling the LS-, Coyote-, and Gen 3 Hemi-swap trends, to continuously innovating late-model and vintage vehicle performance, Holley’s commitment to its customers and their cars is at the core of everything we do.