Holley 0-4412EX

Description

Holley - 0-4412EX

Carburetor - Ultra XP - 2-Barrel - 500 CFM - Holley Flange - No Choke - Single Inlet - Black Anodized - E85 - Each

Ultra XP Carburetor; 2 bbl; 500 cfm; Mech. Secondary; Gas; Dual Fuel Inlet; Model 2300 XP; Gas; Hard Core Gray w/Hard Core Gray Metering Block/Base Plate;

Holley carbs have powered more racers than all others combined and we've just changed the game again. Holley is proud to introduce the all new Ultra XP 2 Barrel. Holley 2 barrels have been a mainstay in oval track racing for decades, but racers always want more. They want more tuning ability, more durability, more weight savings and more features, so Holley listened and designed the all new Ultra XP 2bbl. Delivering the proven results of the Ultra XP 4bbl but now in a 500 CFM 2bbl and E85 Fuel Compatible. It's all aluminum so it provides nearly 50% weight savings. It has no choke tower and an all new air entry area for smoother air flow, yet it retains the critical venturi and throttle bore dimensions for rule racing. It has large capacity XP fuel bowl, wedged float, dedicated race-only throttle lever, billet metering block & base plate, plus much more. The new Ultra XP 2bbl carbs for E85 are available in Black Billet Finish

E85 Fuel Compatible
All aluminum construction - for nearly 50% weight savings over zinc version
Black billet aluminum metering block and base plate
No choke tower for unobstructed airflow
Air bleeds moved outward to allow a smoother transition of airflow
Air cleaner flange centered over venturi for improved airflow and performance. 5/16-18 bent air cleaner stud included
Down-leg boosters for improved fuel signal
Contoured hex head squirter screw for streamlined airflow
Internal pump passage on metering block equipped with tunable bleed off
Same 1-3/8” venturi & 1-11/16” Throttle Bore size and Throttle Plate/Throttle Shaft size of original 0-4412
Fuel bowl provides 20% more fuel capacity while controlling slosh with internal baffling
Clear sight windows on both sides of bowl for easy & safe fuel level adjustments
Fuel trough designed into floor of bowl to route fuel flow directly to the jets and assists in keeping jets covered by fuel
Built in drain plug provides easy access to empty contents of bowl
Throttle shaft rides in oil impregnated sintered bronze bushings for smooth throttle actuation
Throttle shaft capped to prevent entry of debris & contaminates
50cc pump with metal lever. Anti-siphon valve in main body to reduce pump pull over
-8 (O-ring) inlet threads offer a large variety of plumbing options (come with an extended -8 O-ring to -8AN male adapter and -8 plug). Can be plumbed from either side
Dedicated race-only throttle lever with all unnecessary street attachment points & tangs removed
Knurled (hand adjustable) curb idle screw allows for easy idle adjustment without the use of tools
Set screw for wide open throttle stop adjustment
Wedge float provides fuel control while cornering
100% wet-flow tested by Holley technicians to assure it arrives ready to run!