Stock is dual 2" from memory... after the cat. That stuff is fairly free flow (muffler/resonator), the motor does not rev very high and does not make much power anyway. 240hp (when new) from 5.6L is nothing to rave about. I would be surprised if they belt out over 200hp now. So dual 2" will not be restrictive in my eyes at all.

Most gains are going to be seen getting away from the comical Y pipe manifold setup and dumping the cats. Cats from the 80s do not flow well. Running a cat is up to you, I do not care... many more things pollute far more than your catless vehicle.

Even a set of the ECE dual logs are going to flow significantly better than the US bits. In fact, this is the same thing I am doing... I just swiped the parts off a 500SEL. Realistically I bet 15hp is to be had just with that. You can always port match the manifolds to the gaskets for a bit more flow too. Every little bit helps.

__________________
I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]