I just recently added a random tech cat. behind my Borla headers. The problem is that I still have my stock catback. My theory was that if I left the stock stuff back there, It wouldn't be too loud, and would hold up until I could get a real cat-back. No dice, it souds AWFUL. My questions are, Is this causing any damage to my engine? And what good catbacks are out there? Cobb is backordered for the next month, so that's out. I need one soon. What are my options. (and yes, I've read the N/A exhaust thread. About a thousand times)

 

So I went with the Stromung sigle flat tip cat back system. Thanks for the link.