Seller notes

BOP Engineering Two Piece Rear Main Seal for Olds V8 400 425 455 With the mandated removal of asbestos from the factory type rope seals, increased leakage has become commonplace. To address this problem BOP Engineering has designed a rear main seal for the traditional Pontiac V-8's. These seals are not a retrofit from some other engine, but designed from a clean slate using state of the art technology and the best materials. Testing has shown a significant reduction in drag over the factory rope...

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