Compatible with 1967-1969 Chevrolet® Camaro® and Pontiac Firebird®. This product is not created or sold by GM®.; Sparco Seat Bases utilize the factory seat mounts on your vehicle's floor and provide a flat surface for mounting your Sparco seat. All seat bases are vehicle specific and provide a 100% bolt-in installation. The 600 Series Sparco seat base is constructed with 3/16" thick steel to provide a strong flex-free mount. In addition to the mouting holes provided for standard bolt-on installation, the Sparco base has a wide metal platform to allow custom mounting of side mounts direct to the base (drilling required).