Air Cleaners For years, Moroso Air Cleaners and Accessories have set the standard by which all others are judged. Whether in triple-process chrome steel or anodized aluminum colors, Moroso Air Cleaners provide the racer or street-performance enthusiast with improved air flow, a lower stacking height, and unequalled fit and finish. Moroso Air Cleaners and Accessories are simply the best money can buy! Better Airflow! Moroso’s unique radiused air inlet design equalizes air pressure past the boosters for uniform air flow Radiused air inlet is stamped into air cleaner base to reduce overall height More Power! Back to back dyno testing proves a gain of over nearly 10 horsepower over running no air cleaner at all Low Stacking Height! Air Cleaners with 3" element have an overall stacking height above the carburetor lip of only 2-1/2", while 5" filters have a 4-1/2" overall height Fits all Holley®, Carter, Rochester, and Edelbrock carburetors with 5-1/8" dia. necks Great Looks! Available in hand polished triple process chrome or anodized aluminum to match or complement a variety of Moroso engine accessories including valve covers, breathers and ignition wire sets Includes matching wing nut *Not legal for sale or use on pollution-controlled vehicles unless originally equipped with an open element air cleaner.