Complete Baseplate Assm 650-800 CFM

The Complete Baseplate Assembly 650–800 CFM from Advanced Engine Design is a precision aluminum carburetor baseplate engineered for Holley 4150-series four-barrel carburetors. This is a direct-fit replacement component designed for builders and restorers working with classic and modern high-performance fuel delivery systems where flow capacity demands sit in the 650 to 800 cubic feet per minute range. The natural aluminum finish resists corrosion while maintaining the clean, purposeful aesthetic preferred in show cars and street applications alike.

Baseplate assemblies are critical to carburetor function—they house the throttle body, gasket surfaces, and mounting interface between the carb and intake manifold. Advanced Engine Design's offering is manufactured from aluminum for weight savings and thermal efficiency, and comes as a complete assembly ready for installation. At 1.82 pounds and measuring 8.6 × 3.7 × 8.75 inches, it integrates cleanly into standard Holley 4150 applications without requiring extensive modification. The 650–800 CFM rating indicates this baseplate is optimized for mid-range displacement engines running naturally aspirated or moderately boosted setups where responsive throttle control and predictable fuel atomization matter.

This component is essential for engine builders restoring original carbureted powerplants, hot rod enthusiasts upgrading carburetor systems, and performance tuners replacing worn or damaged baseplate components. It serves as both a direct replacement for OEM equipment and a building block in custom fuel system configurations. Whether you're rebuilding a classic V8, assembling a street machine, or maintaining a proven competition engine, a quality baseplate assembly ensures proper carburetor sealing, throttle response, and fuel delivery precision.