umm.... it flows. I think that the engine is "breathing" much better now. but its kinda hard to tell just how much by the butt dyno. I find myself just listening to my exhaust sound instead of paying attention to my rpm's and speeds. But I have no idea how much the hi-flow cat helps.
When I pull up to a stop light and I hear my exhaust, I start to look around for which car its coming from. then I laugh at myself because, duh, its my car.
Edit:
Here's the pics from the exhaust shop. They did a good job running the ehaust over the axle.



Since I sourced the components myself, I picked the magnaflow muffler without the tip on the end. so they tucked the muffler up inside a little bit and poked the exhaust tip out the back a little bit.
This post has been edited by jimmykay: Jul 17, 2009 - 8:30 AM