Spectre's Chrome Round Air Cleaners are designed to fit carburetors and throttle body injection assemblies with a 5-1/8 inch inlet. Engineered to maximize air flow, this assembly includes a red 9 inch by 2 inch Spectre HPR high flow round air filter with synthetic media that arrives factory pre-oiled and ready to use. The triple chrome-plated filter lid is fabricated from high quality steel featuring a smooth chrome finish.