PRL Motorsports Drop In High Flow Panel Air FilterWhy use a PRL Motorsports air filter? Decades of experience as enthusiasts and manufactures have been put together to create record setting intake systems for track and street use. Our air filters are designed to last a lifetime with proper cleaning maintaining (with biodegradable cleaner and synthetic oil). Lighten your wallet while helping the environment! PRL Motorsports oiled filters utilize double layer woven cotton with deep, dense pleats to