I just tried putting on my Greddy on my '93 and I got the old one off and I tired putting the new one on but the piping wouldn't connect to the cat it was too wide. What do I have to do to make it fit? (I might be going to a muffler shop so I don't have to deal with it.) I want it on since I had to bend my stock one so I could get it off. And right now I'm just running my cat with no exhuast pipes and it rattles me and my car hella bad.