Great for crate engines, CTP Air Cleaner housings has everything you need but the filter element.
Includes the flat top, flat base, and 1/2" CTP ring
CTP Flat base provides increased airflow
Promotes cooler air to the carburetor by decreasing turbulence
6-12 hp increase
Lightweight spun aluminum
5-1/8" base fits most Holley 2bbl and 4bbl carbs
Made in the USA