This Filter housing is made to go between your BAU or Injector hat and EFI injector plate or between your hat and your blower when running injectors in your intake manifold.
Does not fit buzzard or barndoor hats.
13-1/4 bolt pattern. K/N Filter included.
Works great with Holley Injector plates with fuel rails to raise hat for clearance and hidden filter for dusty conditions.
Not for use with hidden EFI Injector Plate.
If using as a spacer for BAU and Enderle Injector Hats using injector through the hat, remove filter.