Moroso 65928 Moroso Racing Air Cleaner - 16in x 4in Filter - Offset - Raised Bottom - Clear Powder CoatMoroso 65928 Moroso Racing Air Cleaner 16in x 4in Filter Offset Raised Bottom Clear Powder Coat 14" Offset Air Cleaner with Raised Bottom, 4" element, Powder Coated Clear, 2 and 4 bbl Holley Owners of Small Block Chevy powered cars with 2 and 4 bbl. Holley carbs with 5 1 8" necks don't have to cut up their air cleaners to make room for large diameter distributors, such as HEI Offset forward by 1 1 2" to clear GM HEI distributors For IMCA and NASCAR