Throw away your rope seal and seal your engine with the latest technology!

This is a BERNARD MONDELLO 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.

Item comes as a set.

Note: rear of crankshaft must be polished in the seal area for best results.

MADE IN THE U.S.A.