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Product Description Suitable for 1965-2000 Big Block Chevy 396 427 454 496 502 7.4L V8 engines. Spark Plug Style: Angle Material: Aluminum Style: Bare Finish: Natural Combustion Chamber Volume: 122cc Intake Runner Volume: 330cc Exhaust Runner Volume: 140cc Intake Valve Diameter: 2.250" Exhaust Valve Diameter: 1.880" Valve Stem Diameter: 0.3438" Valve Guide Material: Manganese bronze Intake Port Shape: Rectangle Intake Port Location: Standard Exhaust Port Shape: Square Exhaust Port Location: Stan...

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