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Aeroflow Performance GM LS oil block adapter to suit both front sump LS and rear sump LS fabricated oil pans AF82-2012 and AF82-2016. The AF59-2012 simply allows you to spin-on your OE oil filter in a factory location. This block accepts the OE oil filter AF2296-1017. Features 1 x 1/4" NPT Auxiliary Port.