Carb Insert 2in Tall 1.00in Diameter

The Wehrs Machine Carb Insert 2in Tall 1.00in Diameter (part number WM302-1.0) is a precision carburetor restrictor plate spacer engineered for small-block engine applications requiring controlled fuel and air flow management. This aluminum insert delivers exact bore geometry and consistent throttle response in both naturally aspirated and restricted engine platforms where flow uniformity is critical to performance reliability.

Manufactured from durable aluminum in natural finish, the restrictor plate features a precisely machined 1.000-inch diameter bore and 2-inch tall profile that integrates seamlessly into Wehrs Machine spacer systems. The tight tolerances ensure repeatable air and fuel metering characteristics across multiple engine runs, critical for maintaining consistent horsepower and fuel economy in regulated racing classes or street performance builds where standardized intake restrictions are required. At 0.89 lbs, the insert remains lightweight while providing the structural rigidity necessary to maintain bore concentricity under varying engine loads and temperature cycles.

This carburetor insert is designed for engine builders and serious hobbyists working within small-block platforms where intake restriction rules apply—including vintage drag racing classes, street stock categories, and sealed-engine competition. The product solves the need for precision bore accuracy when compliance with governing body specifications is mandatory. Wehrs Machine spacer system components are recognized in the performance engine community for holding tight dimensional standards that prevent unwanted fuel delivery variations.

Proper installation requires integration with a compatible carburetor mounting plate and intake manifold system. Verify bore diameter and spacer height specifications against your engine platform's requirements before ordering. The natural aluminum finish requires standard corrosion prevention if exposed to moisture during storage.