Ultra HP Carburetor - 950CFM

The Ultra HP Carburetor - 950CFM from HOLLEY is engineered for serious enthusiasts and mechanics building high-performance street and competition engines. This 950 cubic feet per minute carburetor delivers the precise fuel metering and air velocity needed to support substantial horsepower gains on modified V8s and larger displacement powerplants. Whether you're tuning a restored classic, upgrading a muscle car, or developing a custom build, the Ultra HP platform provides the flow capacity and response characteristics that separate marginal builds from genuinely potent machines.

HOLLEY's Ultra HP design incorporates a dual-inlet design and optimized venturi profile that maximizes fuel atomization across the full throttle range while maintaining consistent air-fuel ratios under load. The 950CFM rating indicates this carburetor flows enough air to support approximately 400–500 naturally aspirated horsepower, depending on engine speed and intake manifold design. Precision-machined components, adjustable fuel bowl venting, and progressive linkage ensure reliable cold starts, smooth idle quality, and explosive throttle response—critical factors that separate quality carburetors from cost-cutting alternatives that sacrifice drivability for raw flow numbers.

This carburetor suits builders upgrading stock or mildly modified engines to serious street performance or dedicated track duty. Installation requires a compatible 4-barrel intake manifold and proper fuel supply system capable of delivering consistent pressure—typically 5–7 PSI for carbureted applications. Weighing 8.95 lbs and measuring 12.6 x 9.5 x 14.2 inches, the Ultra HP fits most standard engine bays with adequate clearance verification. Tuning flexibility through jet and air-corrector sizing allows fine-tuning to local fuel octane, elevation, and ambient temperature, making this platform ideal for both bolt-on performance and meticulously calibrated competition builds.