ok, I have an S5 block I will be putting in my 83, my question is since I will be P Porting the motor and don't want to have to pre mix I was thinking of using a 12A front cover with an external OMP resevoir since the 12A OMP only has 2 lines on it and I was just gonna inject oil into the housings and not into the intake tract. So can I use a 12A cover without needing to buy a special oil pan? or should I just buy a GSl-SE front cover?

 

Unless you are going rack and pinion you'll need the GSL-SE pan. I'm using a 12AT front cover to save me having to drill it for the turbo return but you can use a standard 12A one.

 

u will still need the gsl-se oil pan.