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Cometic rear main seal for Chevrolet Mark-IV big block V8 is a two-piece Viton seal built for high heat and chemical resistance. The premium fluoroelastomer material and Cometic's in-house dyno and assembly validation support durability and reliable sealing for heavy-duty and restoration engines using the Mark-IV platform. Designed for long service intervals and dependable operation.
Cometic Chevrolet Mark-IV Big Block V8 Rear Main Seal - 2 Piece
