OSC Premium New Automotive Radiators are designed to OES (Original Equipment Standards) form and function. OSC radiators are technically advanced and feature premium grade materials, including Alcoa Aluminium. The tubes are manufactured with a Cadmium plating, both inside and out, to prevent premature failure. OSC does NOT substitute aluminum coolers in place of Stainless Steel Plate, Copper, or Brass concentric cooler. OSC utilizes a die cut gasket to ensure NO leaks. Each radiator is individually pressure tested and engineered to offer a multi-fit; without compromising the look and fit. All necessary fittings or hardware are included in each unit. All units meet OES cooler design with copper concentric coolers and plate coolers where originally equipped.