Hedman Hedders 27600 Exhaust Header Gasket Features: Made w/Special Material Developed For Hedman Made To Be Exact Matches For Flanges Insure Proper Fit And Seal Height: 0.500 Width: 6.000 Length: 24.000 Weight: 1.00 lbs Fitment: 1979/Pontiac/Firebird/Trans Am Coupe 2-Door/6.6L 400Cu. In. V8 GAS OHV Naturally Aspirated^^1979/Pontiac/Firebird/Formula Coupe 2-Door/6.6L 400Cu. In. V8 GAS OHV Naturally Aspirated^^1978/Pontiac/Firebird/Trans Am Coupe 2-Door/6.6L 400Cu. In. V8 GAS OHV Naturally Aspirated^^1978/Pontiac/Firebird/Formula Coupe 2-Door/6.6L 400Cu. In. V8 GAS OHV Naturally Aspirated^^1977/Pontiac/LeMans/Sport Coupe Coupe 2-Door/5.7L 350Cu. In. V8 GAS Naturally Aspirated^^1977/Pontiac/LeMans/Sport Coupe 2-Door/6.6L 400Cu. In. V8 GAS OHV Naturally Aspirated^^1977/Pontiac/LeMans/Sport Coupe 2-Door/5.7L 350Cu. In. V8 GAS OHV Naturally Aspirated^^1977/Pon...