Holley Ultra XP 750-CFM 4150 Circle Track Carburetor

A lightweight champion that weighs 38% less than stock, this Holley Ultra XP circle track carburetor is your ticket to first place (0-80813BKX)! This 750-CFM marvel, with its mechanical secondaries, propels your ride from a standstill to the front lines in zero time flat. Not only do its PTFE-coated throttle shafts in oil impregnated bronze bushings mean it can handle rigorous use, but it’s also built to last. Though it’s pre-set with 1:1 throttle actuation for your convenience, its secondary linkage is adjustable. The four-corner idle is too, making fine-tuning as simple as twisting the knurled curb idle screws with your hand.

Features and Benefits:
- Ultra XP 4150 carburetor running at 750-CFM for high-horsepower engines
- Lightweight aluminum construction saves 38% of weight or 4-1/2 lbs
- Shiny finish with black anodized billet metering blocks and base plate
- Baffled fuel bowls prevent sloshing while adding 20% fuel capacity
- Contoured venturi inlet increases horsepower by balancing airflow
- Outward air bleeds smoothen airflow transition from top of carb to venturi
- Integrated idle bypass valve eliminates throttle plate holes
- Dual 30cc accelerator pumps
- Clear sight windows for easy fuel level checking
- Built-in drain plug offers quick access to bowl
- Variable use 8AN O-ringed inlet threads
- 4-corner idle allows for precise control
- Mechanical secondaries make for perfect launches from zero
- Elongated dual pattern mounting holes
- Knurled primary/secondary curb idle screws are adjustable without tools
- Capped primary throttle shaft keeps debris out
- PTFE-coated throttle shafts in oil impregnated bronze bushings
- Pre-set with 1:1 throttle actuation
- Stainless secondary link, adjustable for 1:1 or progressive secondary throttle actuation
- Machined accessory hole for addition of primary throttle stop
- Set screw in the base plate for wide open throttle stop adjustment
- Includes notched float and jet extensions
- Wet-flow tested before shipping
- Made in the USA

Since the carburetor is made from lightweight aluminum and coated over with a shiny finish, it promises durability and a visual ‘wow’ factor. The ingenious baffled fuel bowl is slosh-free, hosts a built-in drain plug, and clear-sight windows which all add up to the ultimate fuel efficiency and easy maintenance. Say goodbye to frequent fuel stops thanks to its 20% increase in fuel capacity. You can bet on boosted horsepower and maximized airflow, too, because of the contoured venturi inlet. To pack on even more power though, all you need to do is use the machined accessory hole for a primary throttle stop.

Vehicle Fitment:
- 1965-1985 Ford Mustang
- 1966-1977 Ford Bronco
- 1948-1979 Ford F-100
- 1960-1987 Chevy C10