Rear Main Seal - SBC GM Aluminum Sprint 400 Main

The Cometic Gaskets Rear Main Seal - SBC GM Aluminum Sprint 400 Main is a precision-engineered 2-piece seal designed for Small Block Chevy engines, specifically for those utilizing aluminum main bearing caps in 400-cubic-inch sprint applications. This seal is crucial for preventing oil leakage at the crankshaft's rear end, especially in high-performance and racing scenarios where engine vibration and high RPMs can lead to failures in standard gaskets.

Constructed from high-quality materials, this rear main seal is designed to withstand the rigors of synthetic oils, extreme temperatures, and demanding duty cycles. Its 2-piece design facilitates easier installation without the need for complete engine disassembly, thus reducing labor time while ensuring a reliable seal interface. The precision manufacturing by Cometic Gaskets guarantees a proper fit for aluminum sprint blocks, which require tighter tolerances than standard cast-iron configurations.

Engine builders, sprint car operators, and Small Block Chevy enthusiasts will find this seal essential for maintaining oil containment in performance-modified 400-cubic-inch applications. Whether you are rebuilding after a competitive season or upgrading from a failing OEM seal, this product is designed to meet the high demands of racing environments where oil loss can significantly impact performance.