I'm running a thermal 3in cat back. 2 to flex pipe to 2.5 down pipe. I'm lowered a little in the front and I think stock in the rear. Front springs are red and rear are black, no writing on them. But I scrape the exhaust easily. I have a drive shaft loop that if I get rid of looks like I can save an inch, but the rear is about a half inch from the diff and lower control arm, I don't see how I can save any space there.