Ok so my whole exhaust system was setup for 2.5" throughput, however I have a brand new spun metal 3" Cat bnib that my friend mike picked up in exchange for some mustang parts (package deal). Anyway would i create a backpressure issue
if i opened the pipes and put in the 3". Main problem being in Wisconsin every shop I've talked to about leaving the Cat out gets pissy with me on the phone. I'd do it myself but I don't have a pipe bender, and honestly I'd rather do it on a lift.
So, do i have them install the exhaust from the cat back and put the cat delete pipe in myself, or hit up one of their shop guys for an "on the side, when the shop is closed" type job?