As my topic states, my 2.5 in/out carsound cat took a crap on me yesterday after racing at the strip. It makes a horrible rattling/vibrating sound when my rpms decrease after i rev. i've only had the thing on there for around 2-2 and a half months. Back to the test pipe i go. TOTAL waste of 60 bux

 

can you elaborate on what you mean my took a crap on you?

did the ceramic matrix blow out your tailpipe, or what happened? how can you tell it took a crap? or did the bitsh crack in half