Holley 4500 1250 CFM 3 CIR - BLACK

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

What’s exciting about the patent-pending GEN 3 main body? It's 5/16" taller than its predecessor! This extra height allows for larger radius air entries, optimized using advanced Computational Fluid Dynamics (CFD) software to ensure a smoother flow into the newly machined, big bore venturi.

Another great feature is the integrated idle bypass valve, which lets you adjust the idle while keeping the throttle plate and transfer slot relationship just right. Plus, there’s an extended air cleaner flange for straightforward air scoop attachment with the optional air scoop adapter.

The Gen 3 also boasts high-capacity fuel bowls, offering 20% more fuel capacity to prevent starvation. With an integrated fuel shelf to minimize aeration and internal baffling to control fuel slosh, you can trust this carburetor to perform under pressure. Other standout features include an 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.

Rest assured, each calibration has been rigorously tested on the dyno and track to ensure reliable performance!

Important Downloads:

• Instructions for Part# 0-80908BK
• Carburetor Numerical Listing for Part #0-80908BK

Features:

• All aluminum construction saves 3.8 lbs compared to original models (28% weight savings)
• Shiny finish with 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 easy idle adjustments without affecting throttle plate position
• 12-hole billet booster inserts for exceptional atomization and quick throttle response
• Durable metering blocks with true gasket sealing and fully adjustable components
• Dual 50cc accelerator pumps to deliver 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 the bowls for safe and easy fuel level monitoring
• Convenient drain plug at the front center of the bowl for easy access
• -8 (o-ringed) inlet threads for a variety of plumbing options, compatible from either side
• Factory ready TPS mounting points for data acquisition systems (Holley TPS P/N 534-214 available)
• Knurled curb idle screws for effortless adjustments without tools
• Contoured 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 right out of the box!

Specifications:

• Barrels: 4
• Billet Color: Shiny with Black Billet
• Booster: Annular Billet Insert
• CFM: 1250
• Choke: None
• Circuit: 3
• Emission Code: 4
• Finish: Shiny
• Fuel: Gasoline
• Fuel Inlet: Dual
• High Speed Air Bleed: 34
• Idle Air Bleed Size: 51
• Intermediate Air Bleed: 70
• Material: Aluminum
• Model: 4500
• Needle and Seat Size: 120;120
• Primary Main Jet: 92
• Primary Power Valve: 5.5
• Primary Pump Nozzle Size: 40
• Product Type: Carburetor
• Secondaries: Mechanical
• Secondary Main Jet: 102
• Secondary Pump Nozzle Size: 40
• Supercharged Application: No
• Throttle Bore: 2.125 inch
• Venturi Size: 1.880 inch
• Warranty: Limited 90 Day

Notes:

• New or modified fuel lines are necessary when 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".