I'm looking for a used or new Xpipe with or without cats for a 96 Mustang Vert GT Auto. I just have flowmaster 40s, how much louder should i expect to see from when i instale a xpipe. And when i put one in without Cats will a check engine or some sort of warining come on on my cars dash.?

 

Click my link See sig....I have a UPR O/R X no cats, meow.....without cats it pretty damn loud...alot louder than I had imgained it would be...but I do like it.. cops....not so much ......no cat X ,,you willneed mil eliminators for the rear o2 sensors or a tuner to turn them off....