Rear Seal Adapter

The MOROSO Rear Seal Adapter (MOR38315) is a precision-engineered aluminum component specifically designed to adapt 1-piece block rear main seals to 2-piece crankshaft configurations in small block Chevy engines. This product is essential for engine builders and restoration specialists who are transitioning from older 1-piece block designs to newer 2-piece crank architectures.

Constructed from lightweight aluminum, the adapter not only reduces weight but also offers excellent corrosion resistance. It integrates seamlessly into the pan rail of 1986 and later small block Chevy applications, ensuring that OEM seal functionality is maintained while accommodating the newer crankshaft configuration.

Engine builders and performance enthusiasts will find this adapter invaluable when swapping internally balanced crankshafts into earlier small block Chevy blocks or during engine rebuilds with mixed-generation components. Proper installation requires the correct pan gasket and fastener preparation to create a critical seal interface between the block and crankshaft.