Holley 4500 1050 CFM 3 CIR - BLACK

The original Dominator® revolutionized carburetion back in 1969 when it was designed for NASCAR® racing. Since then, it has undergone significant refinements, culminating in the biggest upgrade yet with the Gen 3 Ultra Dominator. This new version boasts a completely redesigned main body, cutting-edge calibrations, high-capacity fuel bowls, and impressive sizes that reach up to 1475 CFM!

One standout feature of the patent-pending GEN 3 main body is that it's 5/16" taller than its predecessor. This extra height allows for larger radius air entries, which have been fine-tuned using Computational Fluid Dynamics (CFD) software to ensure a smoother flow into the newly machined, big bore venturi.

You'll also appreciate the integrated idle bypass valve, which makes idle adjustments a breeze while keeping the throttle plate and transfer slot relationship just right. Plus, the extended air cleaner flange simplifies attaching an air scoop when you use the optional air scoop adapter.

Designed for high performance, the Gen 3 features high-capacity fuel bowls that hold 20% more fuel to prevent starvation. An integrated fuel shelf minimizes aeration, and internal baffling keeps fuel slosh in check. Constructed entirely from aluminum, it also includes 12-hole billet booster inserts, fully tunable billet metering blocks, adjustable external linkage, throttle position sensor mounting points, and knurled curb idle screws that you can easily adjust by hand.

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

Important Downloads:

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

Features:

• All aluminum construction saves 3.8 lbs compared to original models (28% weight savings)
• Shiny black anodized billet aluminum metering block and booster inserts
• Perfect for drag racing, pro street, or any high horsepower engines
• Calibrations tailored for today’s larger race engines and new fuels
• Fully machined from venturi throat to throttle bore for consistent performance
• Integrated idle bypass valve for easy idle adjustments
• 12-hole billet booster inserts for excellent atomization and quick throttle response
• Durable metering blocks with true gasket sealing and full adjustability
• Dual 50cc accelerator pumps deliver the right amount of fuel from idle to full throttle
• Fuel bowls with 20% increased capacity and internal baffling to control slosh
• Clear sight windows on both sides of bowls for easy fuel level checks
• Convenient drain plug at the front center of the bowl for easy emptying
• -8 (o-ringed) inlet threads for versatile plumbing options
• Factory-ready TPS mounting points for data acquisition systems (Holley TPS P/N 534-214 available)
• Knurled curb idle screws for quick adjustments without tools
• Streamlined hex head squirter screws for improved airflow
• Fully adjustable stainless steel external linkage for customizable throttle activation
• 100% wet-flow tested by Holley technicians to ensure it’s ready to run!

Specifications:

• Barrels: 4
• Billet Color: Shiny with Black 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 you're replacing an existing Holley Dominator 4500 series carburetor. The previous bowl machining was 7/8-20, and the Aluminum Ultra Dominator carburetors come assembled with -6AN to SAE 8 port fittings. The center-to-center fuel inlet measurement is now 11.5".