4 Barrel 1000 CFM Anti Reversion Plate https://www.efihardware.com/products/2235/4-Barrel-Anti-Reversion-Plate
Anti Reversion Plate suits Holley and Rochester Base Patterns on a Single Plane Manifold.
Each hole in the anti reversion plate is 45mm in diameter.
This product is designed to match our 1000 CFM 4 Barrel Throttle Body with part number 802-045(K)