[Wretched]

I am looking for a nice sounding but to loud system that bolts on in a non destructive manner. Basically I want to be able to swap the OEM back when it is time and I would like to install the new cat back without any kind of modification at all. What do you all have experience with?

Is there a header back system that does not require any modification?

Thank for any help! I have been looking at Eisenmann but it seems that the stock exhaust needs to be cut and well I am trying to avoid that.