4 lb. Radiator Cap Price $8.99 Prev Next Product Description Stant Manufacturing Inc., has won nearly every quality and performance award in the industry, and is one of just five suppliers to win prestigious quality awards from all three major American automobile manufacturers. Stant products are winners on the track as well, competing in NASCAR races and Indy Car competition. Stant brand radiator pressure caps have been on every winning Indianapolis 500 race car since 1960. Recommended for the pressurized Model A radiators.