Copper Collector Gasket Inside Diameter: 2.5" w/ Bolts

55-91 SBC Copper Seal Exhaust Gasket, Round Port 1.5"

55-91 SBC Copper Seal Exhaust Gasket, Large Race Port 1.45" X 1.55"

SBC Copper Seal Exhaust Gasket, Square Port 1.38" X 1.38"

65-00 BBC Copper Seal Exhaust Gasket, Rectangular Port 1.85" X 1.90"

SBF Copper Seal Exhaust Gasket, Rectangular Port 1.40 X 1.15"

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SB Chrysler 273-318 Copper Seal Exhaust Gasket, Rectangular Port 1.00" x 1.64"

Pontiac Copper Seal Exhaust Gasket, Oval/D-Shaped Port 1.55" x 1.94"

Copper Collector Gasket Inside Diameter: 3" w/ Bolts

55-91 SBC Copper Seal Exhaust Gasket, Square Port 1.45" X 1.48"

92-97 SBC Copper Seal Exhaust Gasket LT1 LT4 D Shape Port 1.52" X 1.51"

SBC Copper Seal Exhaust Gasket D Shape Port 1.38" X 1.38"

62-97 SBF 260-302 Copper Seal Exhaust Gasket, Rectangular Port 1.12" X 1.48"

58-65 BBF 352-390 Copper Seal Exhaust Gasket, Rectangular Port 1.56" X 2.32"

BB Chrysler 383-440 Copper Seal Exhaust Gasket, Rectangular Port 1.78" x 1.48"

AMC/Jeep 304-401 Copper Seal Exhaust Gasket, Dog Leg Port 1.25" x 1.75"

Copper Collector Gasket Inside Diameter: 3.5" w/ Bolts

55-91 SBC Copper Seal Exhaust Gasket, Round Port 1.63"

SBC Copper Seal Exhaust Gasket, Round Port 1.41"

65-90 BBC Copper Seal Exhaust Gasket, Round Port 1.92"

62-97 SBF 260-302 Copper Seal Exhaust Gasket, Oval Port 1.25" X 1.75"

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68-87 BBF 429-460 Copper Seal Exhaust Gasket, Rectangular Port 1.25" X 2.08"

Oldsmobile Copper Seal Exhaust Gasket, Rectangular Port 1.55" x 1.92"