BBM 426 Hemi Rear Main Seal - Viton

The BBM 426 Hemi Rear Main Seal by SCE Gaskets is a precision-engineered two-piece seal designed specifically for Mopar B and RB-series big-block engines, including the legendary 426 Hemi. This component is essential for preventing oil leakage at the crankshaft's rear main bearing location—a critical seal point that experiences constant pressure and heat cycling during engine operation. Engine builders, restoration specialists, and high-performance enthusiasts rely on quality rear main seals to maintain oil containment and protect long-term engine integrity.

Manufactured from premium Viton elastomer material, the BBM 426 Hemi Rear Main Seal offers superior chemical and thermal resistance compared to standard rubber compounds. Viton's ability to withstand extended exposure to high temperatures, mineral oils, and synthetic lubricants makes it the preferred choice for performance and street applications alike. The AccuSeal two-piece design eliminates the need for complete engine disassembly, allowing for easier installation and replacement without removing the crankshaft or block. This design philosophy reduces labor time while maintaining OEM-equivalent sealing performance and durability under demanding conditions.

This rear main seal is ideal for anyone rebuilding or servicing Mopar B-block or RB-block engines, whether for classic muscle car restoration, drag racing, or street performance applications. The 426 Hemi's legendary power output demands seals that can handle sustained high-RPM operation and temperature extremes. Proper installation of a quality rear main seal is non-negotiable for preventing chronic oil seepage, protecting your investment in engine work, and ensuring reliable operation. Installation should follow manufacturer guidelines and be performed in conjunction with standard rear main seal service procedures.