Base Plate Inserts 1.350 4pk for 1in Spacer

The ALLSTAR PERFORMANCE Base Plate Inserts 1.350 4pk for 1in Spacer (ALL 26068) is a precision set of four aluminum restrictor plate inserts designed for competition engines operating under sanctioned racing regulations. These inserts feature a 1.350-inch inside diameter and are engineered to work seamlessly with 1-inch spacer plates, providing critical flow restriction control required by oval-track racing bodies and sanctioning organizations that mandate maximum engine performance specifications.

Constructed from aluminum in a natural finish, these base plate inserts deliver the precision dimensional tolerance necessary for consistent carburetor fuel delivery and air metering across multiple qualifying and race events. The 1.350-inch ID specification directly controls maximum fuel and air flow rates, making these inserts a critical component for teams seeking compliance with competition rules while maintaining competitive engine performance. The four-pack quantity allows for multiple carburetor setups or backup components during a racing season.

These restrictor plate inserts serve short-track oval racing programs, bracket racing, and heritage stock-car competitors who operate under engine performance regulations that specify maximum carburetor flow rates. Teams running multiple vehicles or requiring spare components appreciate the four-piece packaging. ALLSTAR PERFORMANCE's engineering ensures that each insert meets the exact diameter specification needed for proper fuel system function under regulated competition conditions.

Weighing just 0.23 lbs total, the compact set integrates directly into existing 1-inch spacer plate assemblies without requiring additional machining or modification. Racers and engine builders working within sanctioned classes will find these inserts essential for meeting technical inspection standards and ensuring fuel system consistency across race weekends.