The original Dominator^® revolutionized carburetion back in 1969 when it was crafted for NASCAR^® racing. Over the years, it has undergone numerous refinements, culminating in its most significant transformation yet. Introducing the Gen 3 Ultra Dominator, featuring a completely redesigned main body, cutting-edge calibrations, high-volume fuel bowls, and sizes that reach up to an impressive 1475 CFM!

What’s new? The patent-pending GEN 3 main body is 5/16" taller than its predecessor! This added height allows for larger radius air entries that have been optimized with Computational Fluid Dynamics (CFD) software, ensuring a smoother flow into the newly machined, big bore venturi.

This main body also includes an integrated idle bypass valve, making idle adjustments a breeze while keeping the correct throttle plate and transfer slot relationship intact. Plus, it features an extended air cleaner flange for easy attachment of air scoops when using the available air scoop adapter.

The Gen 3 is equipped with high-capacity fuel bowls that offer 20% more fuel capacity, effectively eliminating starvation issues. It also boasts an integrated fuel shelf to minimize aeration and internal baffling to control fuel slosh. Other standout features include all-aluminum construction, 12-hole billet booster inserts, fully tunable billet metering blocks, adjustable external linkage, throttle position sensor mounting points, and knurled (hand-adjustable) curb idle screws.

Every calibration has been rigorously dyno and track tested to ensure reliable performance!

Important Downloads:

• Instructions for Part# 0-80903RD
• Carburetor Numerical Listing for Part #0-80903RD

Features:

• All aluminum construction saves 3.8lbs compared to original models (28% weight savings)
• Brilliantly shiny with red anodized billet aluminum metering block and booster inserts
• Designed for Drag racing, Pro Street, or any high horsepower engines
• Calibrations tailored for today's larger race engines and modern fuels
• Fully machined from venturi throat to throttle bore for consistent, repeatable performance
• Integrated idle bypass valve for easy idle adjustments without affecting throttle plate relationships
• 12-hole billet booster inserts for exceptional atomization and responsive throttle
• Durable metering blocks with true gasket sealing and full adjustability (emulsion bleeds, power valve channel restrictors & idle feed restrictors)
• Dual 50cc accelerator pumps deliver just the right amount of fuel from idle to full throttle
• Fuel bowls with 20% more capacity and internal baffling to control slosh
• Clear sight windows on both sides of bowls for safe and easy fuel level checks
• Convenient drain plug at the front center of the bowl for hassle-free emptying
• -8 (o-ringed) inlet threads for versatile plumbing options from either side
• Factory-ready TPS mounting points compatible with data acquisition systems (Holley TPS P/N 534-214 available)
• Knurled primary and secondary curb idle screws for effortless adjustments without tools
• Streamlined airflow with contoured hex head squirter screws
• Fully adjustable stainless steel external linkage for 1:1 progressive or soft progressive throttle activation, with no linkage parts under the carburetor
• 100% wet-flow tested by Holley technicians to ensure it’s ready to run right out of the box!

Specifications:

• Barrels: 4
• Billet Color: Shiny with Red Billet
• Booster: Annular Billet Insert
• CFM: 1050
• Choke: None
• Circuit: 3
• Emission Code: 4
• Finish: Shiny
• Fuel: Gasoline
• Fuel Inlet: Dual
• High Speed Air Bleed: 40
• Idle Air Bleed Size: 53
• Intermediate Air Bleed: 63
• Material: Aluminum
• Model: 4500
• Needle and Seat Size: 120;120
• Primary Main Jet: 84
• Primary Power Valve: 5.5
• Primary Pump Nozzle Size: 35
• Product Type: Carburetor
• Secondaries: Mechanical
• Secondary Main Jet: 94
• Secondary Pump Nozzle Size: 35
• Supercharged Application: No
• Throttle Bore: 2.000 inch
• Venturi Size: 1.690 inch
• Warranty: Limited 90 Day

Notes:

• New or modified fuel lines are necessary (if replacing an 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). The center-to-center fuel inlet measurement is now 11.5".