BOP Viton ® Big Block Oldsmobile Two-Piece Rear Main Seals

With the mandated removal of asbestos from the factory type rope seals, increased leakage has become commonplace. To address this problem BOP Engineering devoloped a rear main seal for the traditional Olds 400, 425, 455 V-8's. These seals are designed from a clean slate using state of the art technology and the best materials. 20 plus years of proven sucess makes this the best two-piece seal on the market. 25 plus years of proven sucess makes this the best two-piece seal on the market. Buy direct from the manufacturer BOP Engineering www.bopengineering.com.