Air Intake Plenum has a single inlet with a 4 inch outside diameter.

-Manufactured from polished cast aluminum.
-Plenum is designed to be compatible with 4 inch tubing, filters, and accessories.
-3-1/2 inches tall and measuring 9 inches from air cleaner stud to the inlet, it fits carburettors and TBI throttle bodies with a 5-1/8 inch inlet.
-Nut is not included.

Please Note: All Cast products will have slight imperfections from time to time.