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The Peterson big block Chevy rear crank seal is a split rear main replacement intended for big block Chevrolet engines. Peterson’s seals are specified for use in applications running crankcase vacuum and are intended to maintain higher vacuum levels to support controlled crankcase operation. That vacuum retention makes them useful for dry-sump and other vacuum-reliant engine setups that need consistent oil control.
Peterson Fluid Systems Chevrolet Big Block Rear Crank Seal
