Airaid U-Build-It - Silicone Reducer 4in to 3.5in x 28 degree angle Air Filters>Pre-Filters Ideal as a post pump

Ideal as a post pump filter with gasoline

For engines requiring high volume

Can be used in Carbureted or EFI applications

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With air springs equipped

Airaid U-Build-It - Silicone Reducer 4in to 3.5in x 28 degree angle Air Filters>Pre-Filters Ideal as a post pumpFounded in 1997, AIRAID advanced the automotive aftermarket industry with the introduction of its AIRAID Intakes brand of air intake systems. Initially developed for light trucks and sport utility vehicles, the first AIRAID kits combined an open element cotton gauze filter with an intake tube to produce an innovative, easy to install intake kit which dramatically increased air flow, horsepower and torque while improving overall engine performance.