Billet Throttle Base Plate - 850CFM

The PROFORM Billet Throttle Base Plate for 850 CFM carburetors is a precision-engineered aluminum component designed for Holley 850–1050 CFM mechanical secondary carburetors. This complete base plate assembly combines structural integrity with the smooth operation demanded by high-performance engine builds, offering a direct-fit solution for carburetor installation and throttle linkage mounting on classic muscle cars, street rods, and competition vehicles.

Machined from billet aluminum and finished in purple anodize, this throttle base plate provides both durability and visual appeal in engine bays where the carburetor remains exposed. The anodized finish protects against corrosion while resisting the heat cycling common in high-output engines. The complete assembly includes all necessary mounting surfaces and throttle linkage attachment points, eliminating the need to source additional components. At 1.95 lbs, the base plate adds minimal weight while maintaining the rigidity required for precise throttle response and linkage stability under full acceleration.

This component suits builders and enthusiasts restoring or upgrading vehicles with Holley mechanical secondary carburetors. Whether you're addressing wear on an original base plate, upgrading to a more robust billet design, or completing a carburetor rebuild, this OEM-compatible replacement ensures proper throttle blade alignment and smooth mechanical secondary actuation. Compatibility is confirmed for Holley 850–1050 CFM carburetors with mechanical secondary operation, making it essential hardware for carb swaps, restorations, and performance fuel system upgrades.