Product Details
- Holley Ultra XP 4150 Race Carburetor is built for competitive motorsports, offering a lightweight design, increased fuel capacity, and extensive adjustability for track-focused performance
- Constructed entirely from aluminum, reducing weight by up to 38 percent compared to conventional race carburetors
- Large-volume fuel bowls supply approximately 20 percent more fuel to help minimize starvation during aggressive launches and sustained high-RPM operation
- Radiused venturi entries and strategically relocated air bleeds enhance airflow efficiency and support greater horsepower potential
- Features billet metering blocks equipped with adjustable emulsion bleeds, power valve channel restrictors, idle feed restrictors, four-corner idle control, and dual accelerator pumps for precise tuning
- Includes a built-in idle bypass adjustment, tunable secondary linkage, dual-pattern mounting flange, sight windows, drain plug, and 8AN inlet threads for race-ready convenience
- Covered by a 90-Day Warranty
When you stage and bring the rpm up, there is no room for hesitation. Immediate throttle response, stable fuel delivery, and balanced airflow can decide the outcome in a fraction of a second. Designed for competitors who expect reduced weight, increased fuel capacity, and broad tuning control, the Holley Ultra XP 4150 Race Carburetor is built to perform under race conditions.
Constructed from aluminum to significantly reduce overall weight compared to many traditional race carburetors, the Ultra XP is engineered with enlarged fuel bowls that offer increased capacity to help minimize fuel starvation during aggressive launches and sustained high rpm operation. Developed for drag racing, circle track competition, and high horsepower applications, it incorporates contoured venturi entries and strategically positioned air bleeds to promote smoother airflow and improved output potential. Billet metering blocks provide extensive tuning capability, including adjustable emulsion bleeds, power valve channel restrictors, and idle feed restrictors. Four corner idle adjustment and dual accelerator pumps help maintain crisp throttle response throughout the rpm range. An integrated idle bypass system supports proper throttle plate positioning and aids idle stability when using more aggressive camshaft profiles. Adjustable secondary linkage allows either progressive or one to one operation, and dual bolt patterns accommodate multiple intake flange styles. Additional features such as clear sight windows, integrated bowl drain plugs, 8AN fuel inlets, knurled curb idle screws, and factory wet flow testing contribute to competition ready consistency. Finish options include hard coat anodized gray with billet accents or polished aluminum variants with color accents for a customized appearance.
Combining lightweight construction, expanded fuel control, and race focused adjustability, this square bore carburetor is designed to deliver repeatable performance pass after pass. It offers the precision and durability serious racers expect. Backed by a 90-Day Warranty.
