I've had an ark cat back exhaust for about 6 months and i came into a pair of berk test pipes. After i had them installed i got a rattle like a bb stuck in a can i located where the sound was coming from and its in the x pipe. I've searched the topic and found 1,000 different threads, has anyone had this exact problem and got a sure fix for it ?

 

Its normal. The only way to get rid of it is to go back to stock cats

 

Thanks, I'm actually at the shop doing that now, the gains are nice but I hatext sounding like a $100 civic set up. Live and learn I guess.