Gm Tpi Oval Filter

The GM TPI oval filter is a reusable cotton air filter element engineered for classic and performance Chevrolet TPI (Tuned Port Injection) systems and universal applications requiring oval clamp-on filtration. Built for enthusiasts and mechanics who demand reliable engine protection without the recurring expense of disposable paper filters, this oval filter delivers superior airflow characteristics while maintaining consistent filtration efficiency across your engine's RPM range. Whether you're running a stock TPI setup or a modified build, this filter bridges the gap between economy and performance.

Constructed from washable red cotton media, the GM TPI oval filter measures 6.5 x 4.75 inches across its oval footprint with a 5.625-inch height and 2.938-inch flange, engineered to fit the unique inlet geometry of TPI manifolds and compatible clamp-on air box assemblies. The reusable cotton construction provides lower restriction than traditional paper filters, promoting improved throttle response and better fuel mixture atomization—critical factors when tuning carbureted or fuel-injected engines for peak efficiency. Unlike single-use paper elements, this filter can be cleaned with compressed air or mild soap and water, then re-oiled and reinstalled, making it an economical choice for high-mileage vehicles or frequent drivers.

This oval filter is ideal for owners of 1985–1992 Chevrolet Corvettes, Camaros, and other TPI-equipped models, as well as custom engine swaps and universal applications where oval clamp-on filtration is required. Installation requires a compatible oval air box or custom ducting with matching clamp-on inlet; measure your intake opening before purchase to confirm the 6.5 x 4.75-inch oval dimensions align with your application. Proper filter seating and regular maintenance—cleaning every 10,000 to 15,000 miles depending on driving conditions—ensures optimal engine breathing and longevity of both the filter and your fuel system.