Carburetor Main Body - 850CFM

The Carburetor Main Body – 850 CFM is a performance-grade carburetor component engineered to convert street carburetors into high-flow, competition-capable fuel delivery systems. Constructed from aluminum and finished in natural bare metal, this main body (part number 67107C) serves as the core assembly for Holley 850 CFM carburetors, making it essential for builders pursuing significant flow rate increases and optimized fuel atomization on both street and strip applications.

At 850 cubic feet per minute (CFM), this carburetor main body is rated for engines requiring substantial air volume—typically V8s in the 400+ horsepower range. The aluminum construction keeps weight minimal while the natural finish allows for easy inspection of internal wear patterns and fuel distribution characteristics. This replacement main body enables restoration of tired carburetors or complete assembly of new high-performance carburetors from components. Measuring 5.8 x 5.5 x 5.8 inches and weighing 3.1 lbs, the main body integrates with Holley's modular carburetor platform, allowing builders to mix matched components for precise tuning.

This component is ideal for engine builders, hot rodders, and performance enthusiasts upgrading factory or worn carburetors on classic muscle cars, street rods, and race-prepared vehicles. Holley's 850 CFM platform remains the benchmark for naturally aspirated high-displacement engines seeking reliable, tuneable fuel delivery without the complexity of fuel injection. Direct replacement or rebuilding projects benefit from access to OEM-quality main bodies that maintain original specifications and flow characteristics.

The 850 CFM class sits between mid-range 750 CFM carburetors and ultra-high-flow 1050+ CFM models, making it the practical choice for big-block engines and serious street/strip combinations where excessive fuel flow can degrade part-throttle drivability. Sourcing individual quality components—rather than rebuilding problematic originals—ensures consistent performance across multiple seasons of use.