Holley 4500 1050 CFM 2 CIR - BLACK

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

One of the standout features of the patent-pending GEN 3 main body is its height—now 5/16" taller than previous models! This extra height allows for larger radius air entries, optimized using Computational Fluid Dynamics (CFD) software, which ensures a smoother flow into the newly fully machined big bore venturi.

This main body also includes an integrated idle bypass valve, making idle adjustments a breeze while keeping the throttle plate to transfer slot relationship just right. Plus, there's an extended air cleaner flange for easy attachment of an air scoop when you use the available air scoop adapter.

The Gen 3 is equipped with high-capacity fuel bowls that provide 20% more fuel capacity, effectively eliminating starvation issues. It features an integrated fuel shelf to reduce fuel aeration and internal baffling to manage fuel slosh. Other highlights 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.

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

Important Downloads:

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

Features:

• All-aluminum construction saves 3.8 lbs compared to original models (28% weight savings)
• Gleaming black 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 performance
• Integrated idle bypass valve for smooth idle adjustments
• 12-hole billet booster inserts for excellent atomization and responsive throttle
• Durable metering blocks with true gasket sealing and complete adjustability
• Dual 50cc accelerator pumps ensure optimal fuel delivery from idle to full throttle
• Fuel bowls with 20% increased capacity and internal baffling to control slosh
• Clear sight windows on both sides of the bowls for easy fuel level checks
• Convenient drain plug located at the front center of the bowl for easy emptying
• -8 (o-ringed) inlet threads provide various plumbing options, accessible from either side
• Factory-ready TPS mounting points compatible with data acquisition systems
• Knurled (hand adjustable) curb idle screws for effortless idle adjustments
• Contoured hex head squirter screws for optimized airflow
• Fully adjustable stainless steel external linkage for customizable throttle activation
• 100% wet-flow tested by Holley technicians to guarantee it's ready to run!

Specifications:

• Barrels: 4
• Billet Color: Shiny with Black 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

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, while 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".