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The Peterson small block Chevy rear crank seal is a double-split rear main replacement for Small Block Chevy engines. Peterson seals are intended for engines operating with crankcase vacuum and are designed to keep vacuum levels high to support better crankcase control. That capability is particularly useful for dry-sump and other vacuum-managed systems where consistent vacuum benefits oil handling.
Peterson Fluid Systems Chevrolet Small Block Rear Crank Seal - Double Split
