Adjustable Base Plate 1/2in

The ALLSTAR PERFORMANCE Adjustable Base Plate 1/2in (ALL 26180) is a precision-engineered restrictor plate designed for high-performance engine applications requiring flow control and fuel mixture regulation. This 1/2-inch thick aluminum component features a 4-hole square bore configuration, delivering the dimensional accuracy and material consistency that serious engine builders demand when optimizing carburetor performance and fuel delivery systems.

Constructed from aluminum and finished in natural, unpainted condition, the base plate withstands repeated thermal cycling and carburetor mounting cycles without warping or degradation. The 1/2-inch thickness provides structural rigidity necessary for consistent sealing and proper fuel metering function. The square bore design ensures compatibility with standard carburetor stud patterns, while the 4-hole configuration allows precise alignment and secure fastening. Weighing just 1.08 lbs with compact overall dimensions of 8 x 0.95 x 11.05 inches, this restrictor plate integrates seamlessly into existing engine fuel system architectures.

This component is essential for engine builders, race shop technicians, and performance enthusiasts working on naturally aspirated and fuel-restricted competition engines where precise fuel delivery control directly impacts power output and consistency. The adjustable design accommodates various carburetor types and mounting configurations, making it a versatile solution for both street and track applications requiring fuel system regulation compliance.

ALLSTAR PERFORMANCE is recognized for manufacturing OEM-quality restrictor plates and fuel system components used across drag racing, circle track, and high-performance street applications. This 1/2-inch base plate is a direct replacement and upgrade option for builders seeking improved reliability and precise fuel metering in carburetor-fed engine packages.