THE ULTIMATE OIL PAN GASKET PROBABLY THE BEST GASKET OUT THERE . PROPRIETY CORK / RUBBER WITH STEEL CORE , SPECIALLY DESIGNED FOR THE BEST SEAL POSSIBLE AND WONT SQUEEZE OUT BETWEEN BOLTS WHEN TORQUE DOWN . EVERY ONE KNOWS THERE ISN'T NOTHING WORSE THEN AN OIL PAN LEAK . OVER THE YEARS I HAVE FOUND THIS IS THE BEST GASKET OUT THERE FOR AN OLDSMOBILE .