Features:

• All aluminum construction saves 3.8lbs. over original models (28% weight savings)
• Designed for use on Marine high horsepower engines
• Fully machined from venturi throat to throttle bore for predictable & repeatable performance
• Integrated idle bypass valve allows for adjustment of idle while maintaining correct throttle plate to transfer slot relationship
• 12 hole billet booster inserts for superior atomization and crisp throttle response
• Metering blocks feature improved durability, true gasket sealing and fully adjustable (emulsion bleeds, power valve channel restrictors & idle feed restrictors)
• Dual 50cc accelerator pumps provide the perfect amount of fuel from idle to full throttle
• Fuel bowls provide 20% more fuel capacity while controlling slosh with internal baffling
• Clear sight windows on both sides of bowls for easy and safe fuel level adjustments
• Built in drain plug in front center of bowl provides easy access to empty contents of bowl
• 8 (o-ringed) inlet threads offer a large variety of plumbing options and can be plumbed from either side
• Factory ready TPS mounting points for use with data acquisition systems (Holley TPS P/N 534-214 available)
• Knurled (hand adjustable) primary and secondary curb idle screws allow for easy idle adjustment without the use of tools
• Contoured hex head squirter screws for streamlined airflow
• Fully adjustable stainless steel external linkage can be adjusted for 1:1 progressive, or soft progressive throttle activation. No linkage parts under the carburetor
• 100% wet-flow tested by Holley technicians to assure it arrives ready to run!
• J-Style vent tubes

Fitment Notes:

• This carburetor main body is 5/16” taller than previous gen 2 Holley Ultra Dominator Models. This new height allowed for larger radius air entries to deliver smoother flow.
• New or modified fuel lines are required if replacing 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. Center to center fuel inlet measurement is now 11.5".

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

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