These are only a few weeks old. I bought them when I thought I was going with a supercharger. I got a Twin Turbo kit with 3" down pipes and external waste gates so I have no need for these.
They have less then 1500 miles on them.
I did get a CEL with these but I just put some steel wool in the bungs and it solved the issue.
I had Berk High Flow Cats before these and I would say that the sound was nearly identical. The RTP's were maybe a tough louder.
Asking $180 shipped to the lower 48.
