I have ran the 4" catback Flowmaster exhaust for a little over two years now but about 2 weeks ago the NY salt finally took effect. The flange on the muffler rotted off letting the tail pipe flop around. I had to buy another exhaust for now through Jegs and they will be reimbursing me after i send the old exhaust back and it is inspected. This time i didnt bother putting the muffler on, i stuffed a piece of pipe in its place and not only does it sound better but i no longer have to worry about the muffler rotting out. The pipe itself was in great shape and i suspect it will last quite a few yrs now.