Right now i have 2.5' single pipe from the headers and 2.25 duals out of the y pipe in the rear. i was wonderin if anyone has used the 80 seires flowmaster on a set up like this and if gives u a deep sweeta$$ sound. I was olso wondering if it will kill my 400 HP.I am also oppen to other muffler suggestions. Thanks


[This message has been edited by mustangs killer (edited February 13, 2001).]

 

If you are putting out 400hp I think I would step up to a full 3 inch exhaust system. That will help the flow a little and free up some HP i think. What size headers do you have?