- Holley Supercharger XP 4150 Race Carburetor is designed for draw-through supercharged racing combinations, delivering accurate fuel metering and dependable performance under sustained high boost
- Offered in 600, 750, and 950 CFM configurations, featuring a tumble-polished finish with contrasting black details
- Incorporates a radiused venturi inlet and replaceable screw-in air bleeds to promote smooth airflow and allow precise calibration
- Equipped with high-flow billet metering blocks, a billet base plate, and Dominator-style fuel bowls with dual-feed fuel inlets for increased capacity
- Features dual 30cc accelerator pumps and mechanical secondaries to support hard launches and rapid throttle transitions
- Utilizes a boost-referenced power valve that monitors intake vacuum below the supercharger, calibrated for Big Block Chevrolet 2x4 8-71 and 10-71 blower setups, along with four-corner idle adjustment for fine tuning
- Covered by a 1-Year Limited Warranty
High-boost race combinations require a carburetor that can keep pace with demanding airflow and fuel needs. In draw-through supercharged applications built for maximum output, consistent fueling and immediate throttle response are critical on every run. The Holley Supercharger XP 4150 Race Carburetor is engineered for racers who want performance-focused calibration and track-ready capability straight from the start.
Expanding the XP Series lineup for draw-through blower setups, this 4150-style square-bore carburetor is offered in 600, 750, and 950 CFM versions. Each model features a tumble-polished finish with black accents for a clean, competition-inspired appearance. A radiused and contoured venturi entry promotes smooth, balanced airflow, while replaceable screw-in air bleeds allow detailed tuning adjustments. High-flow billet metering blocks and a billet base plate add strength and precision, and Dominator-style fuel bowls enable fuel line routing from either side for flexible plumbing options.
Equipped with dual 30cc accelerator pumps and mechanical secondaries, the carburetor is designed to support hard launches and rapid throttle transitions. Dual fuel inlets maintain high-volume fuel supply, and a boost-referenced power valve monitors intake manifold vacuum below the supercharger to help deliver proper enrichment under load. Each unit is wet-flow tested prior to release to promote readiness for competition use.
Additional features include a Big Block Chevrolet 2x4 871 and 1071 blower calibration, four-corner idle adjustment for precise control at idle, and a trimmed throttle lever for improved clearance in sideways mounting configurations. This carburetor is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles. Backed by a 1-Year Limited Warranty.