Holley 4500 1050 CFM 2 CIR - RED

Back in 1969, the original Dominator® revolutionized carburetion for NASCAR® racing, and since then, it has undergone some impressive refinements. The latest iteration, the Gen 3 Ultra Dominator, showcases a completely redesigned main body, cutting-edge calibrations, and high-volume fuel bowls, with options reaching up to 1475 CFM!

One of the standout features of the patent-pending GEN 3 main body is its increased height of 5/16". This enhancement allows for larger radius air entries, which have been optimized using advanced Computational Fluid Dynamics (CFD) software to ensure a smoother flow into the newly machined, big bore venturi.

The main body also comes equipped with an integrated idle bypass valve, making it easy to adjust the idle while keeping the throttle plate and transfer slot relationship just right. Plus, the extended air cleaner flange simplifies the attachment of air scoops when using the available air scoop adapter.

With high-capacity fuel bowls that offer 20% more fuel capacity, you won't have to worry about starvation. The integrated fuel shelf reduces fuel aeration, and internal baffling helps control slosh. Other impressive 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 tested on the dyno and the track to ensure reliable performance!

• Instructions for Part# 0-80902RD
• Carburetor Numerical Listing for Part #0-80902RD

• All-aluminum construction saves 3.8lbs compared to original models (28% weight savings)
• Shiny finish with red anodized billet aluminum metering block and booster inserts
• Ideal 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 and repeatable performance
• Integrated idle bypass valve allows for idle adjustments while preserving the correct throttle plate to transfer slot relationship
• 12-hole billet booster inserts ensure superior atomization and responsive throttle
• Durable metering blocks with true gasket sealing and fully adjustable components
• Dual 50cc accelerator pumps deliver the perfect fuel amount from idle to full throttle
• Fuel bowls feature 20% more capacity and control slosh with internal baffling
• Clear sight windows on both sides of bowls for safe and easy fuel level adjustments
• Convenient drain plug located at the front center of the bowl for easy access
• -8 (o-ringed) inlet threads provide a variety of plumbing options, plumbable from either side
• Factory-ready TPS mounting points for data acquisition systems (Holley TPS P/N 534-214 available)
• Knurled (hand adjustable) primary and secondary curb idle screws for effortless idle adjustments
• Contoured hex head squirter screws promote streamlined airflow
• 100% wet-flow tested by Holley technicians to ensure it's ready to run right out of the box!
• Fully adjustable stainless steel external linkage can be set for 1:1 progressive or soft progressive throttle activation, with no linkage parts beneath the carburetor.

• Barrels: 4
• Billet Color: Shiny with Red Billet
• Booster: Annular Billet Insert
• CFM: 1050
• Choke: None
• Circuit: 2
• Emission Code: 4
• Finish: Shiny
• Fuel: Gasoline
• Fuel Inlet: Dual
• High Speed Air Bleed: 32
• Idle Air Bleed Size: 57
• 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

• New or modified fuel lines are necessary if you're replacing an existing Holley Dominator 4500 series carburetor. The previous bowl machining was 7/8-20, while Aluminum Ultra Dominator carburetors come assembled with -6AN to SAE 8 port fittings. The center-to-center fuel inlet measurement is now 11.5".