Edelbrock 8711 Phenolic Carburetor Spacer Used where more plenum volume or more carburetor-to-plenum floor distance is required Spaces your carburetor above the intake flange to increase plenum area High-tech, 4-hole, black, phenolic carburetor spacer with 1 thickness Withstands extreme temperatures Enhances low-RPM torque, throttle response and dampens reversion effects on the carburetor