Spectra Premium GMP11B Oil Pan for Chevrolet/Oldsmobile/Pontiac Spectra Premium oil pans meet or exceed the performance of the original equipment oil pans they replace 100 percent performance and vehicle engine fit tested Washed, then sealed with an anti-corrosive spray on both interior and exterior Durable powder coating applied to exterior of oil pan Coating salt spray tested for over 200 hours in accordance with ASTM B117 standards