Not Legal for Street use in California on Vehicles Originally Equipped with 2-Barrel
Carburetors for which there was no 4-Barrel Option.
Adapter P/N
17-6 is Required when using a "Square Flange" Carburetor on a "Spread Bore Manifold. It is not Recommended or Advised that Holley Street Legal
Carburetors which are LIsted for Trucks be used on Motor Homes.