Rear Seal Adapter Sbc

The Moroso Rear Seal Adapter SBC (part number 38415) is a precision-engineered aluminum adapter designed for small-block Chevy engines. This product is ideal for engine builders performing retrofits, upgrades, or restorations where crankshaft compatibility differs from the original block design. It addresses the need for a reliable solution in various engine configurations.

Constructed from lightweight aluminum, this adapter maintains the necessary rigidity to ensure proper seal function under engine load. It allows for the conversion from a one-piece rear main seal configuration to a two-piece crank seal setup, making it essential for compatibility in small-block Chevy applications spanning 1955–1986. The kit includes all necessary components for installation, simplifying the process for users.

Engine rebuilders, restoration enthusiasts, and performance shops will benefit from this adapter, especially when performing small-block Chevy stroker conversions or vintage engine restorations. Proper installation is critical to prevent oil leakage at the crankshaft journal, a common failure point in older and rebuilt engines. This adapter provides a cost-effective solution without requiring costly modifications.