SKU: HLY0-80576SA
UPC: 090127145340
MPN: 0-80576SA
The Holley 4150 750 CFM Supercharger XP Carb with Draw-Through Design is a purpose-built 4-barrel carburetor engineered for high-displacement supercharged and turbocharged engine applications requiring maximum fuel delivery and atomization. This 750 CFM unit combines square-bore compatibility with dual inlet configuration, delivering the flow capacity needed in forced-induction powerplants where precision fuel metering directly impacts boost response and overall drivability under sustained load.
The draw-through design fundamentally changes carburetor function compared to conventional blow-through setups. In this configuration, the supercharger or turbo pulls the air-fuel charge through the carburetor, requiring robust internal construction to handle the pressure differential and sustained boost conditions. The mechanical secondary system provides progressive fuel delivery as throttle opens, preventing bog and maintaining combustion efficiency across the RPM band. The no-choke design eliminates cold-start complications common in forced-induction applications, where traditional enrichment circuits can create fuel delivery inconsistencies. Black anodized and tumble-polished aluminum construction resists corrosion while maintaining the thermal properties critical to fuel temperature stability in high-heat engine bays.
This carburetor targets serious engine builders and hot-rod enthusiasts running small-block or big-block platforms with positive-displacement blower or centrifugal turbo systems where stock fuel delivery falls short of boost demands. The 750 CFM specification positions it for mid-range displacement engines (typically 383 to 427 cubic inches) running moderate boost levels where fuel atomization precision prevents detonation and supports consistent power output. Builders and tuners working with established forced-induction platforms recognize this model as a direct bolt-in replacement for aging carburetors or as an upgrade path when factory electronics are not an option.
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