These carburetor hats from Holley fill a desperately-needed void for a well-designed, cost-effective carburetor hat for throttle bodies and carburetors. You can easily spend twice as much on a carburetor hat that is not as well designed as these. They bolt onto virtually any 2300, 4150 or spreadbore carburetor or EFI throttle body with the 5 1/8-inch air filter flange. At under 4 inches high these fit under most hoods, and are CAD designed for maximum airflow and perfectly even air distribution.

Designed for 3.5-inch piping, simply plumb yours with a 3.5-inch ID silicone coupler (not included.) It even has a 1.8-inch NPT port to provide you with a boost reference port for your fuel pressure regulator. Includes gasket and 1/4-inch air cleaner stud. Choose yours in natural aluminum finish or powder-coated black.