ANODIZED 4QT OLDSMOBILE PAN WITH BEST OLDSMOBILE OIL PAN GASKET IN THE MARKET . IT IS DESIGNED NOT TO CRUSH OUT WHEN TIGHTENING OIL PAN BOLTS .I USE THIS OIL PAN GASKET FOR ALL APPLICATION BUT WORKS BEST FOR HIGH PERFORMANCE AND MARINE APPLICATION . IT HAS MEDAL SHIM INSIDE OF CORK AND SILICON/ RUBBER OUTSIDE. ALSO COMES WITH NEW BOLT KIT, WHY USE THE OLD PAN BOLTS .307,330,350,403 AND 400,425,455