BBC Rear Main Seal - 2-Piece

The BBC Rear Main Seal - 2-Piece from SCE Gaskets is the OEM-grade solution for Big Block Chevy engine builds, restorations, and high-performance modifications. Whether you're rebuilding a classic muscle car, swapping a BBC into a custom platform, or refreshing a tired long-block, a quality rear main seal is critical to preventing catastrophic oil leaks that can compromise engine longevity and cleanliness. This two-piece design is the industry standard for BBC applications, offering superior sealing geometry compared to single-piece alternatives.

Manufactured from premium silicone material, this rear main seal provides enhanced flexibility and durability across a wide temperature range—essential for both street engines and aggressive power applications. The two-piece construction allows for precise installation without full engine removal and accommodates the unique crankshaft journal geometry of Big Block Chevy engines. Silicone composition resists oil degradation and thermal cycling better than traditional cork or rope seals, reducing weeping and maintaining a dry engine bay even under sustained use or during spirited driving sessions.

This seal is ideal for anyone undertaking a BBC engine build, whether for a Chevelle, Corvette, Camaro, or custom hot rod. Installation pairs seamlessly with complete gasket sets during engine assembly or service. Its compact dimensions (5.75 x 0.55 x 7.75 inches) ensure proper fit within the BBC crankcase, and the lightweight construction (0.11 lbs) makes handling during installation straightforward. Choose SCE Gaskets' BBC Rear Main Seal - 2-Piece for reliability and peace of mind in your next big-block project.