looking for a cat back for my sti. I don't want loud, just want to free up a little boxer rumble. Are the cobb exhausts still made by stromung? If not, is one quieter than the other? In the past Ihad a bpm twister on my wrx wagon (tbe) and it was way too loud for me. Then I had the vishnu twin tip tbe which was quiter but still a bit loud. On my sti, I only want a cat back for now.