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When fitting 1996 2.0 oil control rings. Does the bottom lock ring go at the top or the bottom of the piston. On cylinder 1 and 3 according to diagram of ring gap fitment, they would face bottom of piston but on cylinder 2 and 4 they would be at top which is correct for that side. Do you just reverse it to make it at the top ? i have no other fitting instructions as these are for all engines. but im sure subaru are different.any help would be appreciated thanks