my exhaust set up is downtubes with no cats to a single 2.5" pipe that Y's into 2.5" borla(straight threw). the downtubes are 2 1/4". what am i good till HP or mod wise?
um, in a word, i would say no. And most definatley not if it is not mandrel bent. With the sharp bends you can lose 40% of the pipe dia. with compression bends.
The exhaust system on my 95 SC is pretty much the same as Rick's and it ran a best of 13.778 @ 99.31 mph with just bolt on's. Stock long block, and intercooler.