I noticed latly that I have had a pretty mean rattle coming from my car. I had at first thought it was my Transaxle but today it was especially bad and I notiticed it was coming from my Cat. Has anyone else experienced this. If so I would like to just replace it wit hstraight pip which I cant do cause it has a slight bend in it. Has anyone gone to a muffler shop and had it done or know the exact dimensions I might need?