SBC Rear Main Seals 2-Piece Dyno-Pak (10)

The SBC Rear Main Seals 2-Piece Dyno-Pak from SCE Gaskets is engineered specifically for small-block Chevrolet engines, ensuring reliable crankshaft sealing during high-performance operation. Ideal for street engines, dyno preparations, or weekend builds, these seals effectively prevent oil weeping and blowby at critical junctions on your block.

Featuring a two-piece design, these seals distribute clamping pressure evenly across the contact surface, minimizing friction and heat buildup compared to single-piece seals. The elastomer composition is resistant to degradation from modern synthetic oils and elevated temperatures, while the Dyno-Pak designation indicates that these seals have been validated for performance under demanding conditions.

Any SBC platform—305, 327, 350, 400—benefits from these seals, making them suitable for stock restorations or full-race builds. Installation is straightforward during main cap assembly, ensuring a reliable seal for your engine rebuilds.