dont know alot about cut out's just what i have seen on this site. I have a single cat 95 Z dose it go befor the cat or after the cat also have stock manafolds and cat w/ 3 1/2 in. flowmaster catback. A budy of mine said go befor the cat but is hard to get to to open and close it, looking for your opinion's befor I go and do this I want the right install, also thought about having it befor the rear axle ? please help thanx