I have one for a one piece rear seal. It has a baffle in it . I am not sure if it was a offshore style or a jet boat style. I had it on my motor but at high rpm the oil would splash around to much and I would loose oil pressure and my oil temp went high. I took it off and everything was fine. It is a Dooley. I don't have the pickup. some dumb ass engine builder I used once lost it on me. they installed the stock pickup instead. that might of been my problem.