OLDSMOBILE NEOPRENE REAR MAIN SEAL 400,425,455 350 DX

This is a neoprene rear main seal for (400 – 425 – 455) B/B Oldsmobile engines and 350 DIESEL engines.  This rear main seal is hard to find for the big block and 350 DIESEL Oldsmobile engines.  Note:  rear of crankshaft must be polished in the seal area for best results.  Item comes as a set. Throw away your rope seal and seal your engine with the latest technology.  MADE IN USA