A J-pipe is a downpipe that’s formed just like a J. It’s a greater-flowing pipe that leaves less backpressure. I have a 2014 Audi A5. I intend to make it louder…any tips? It is just a lease, so I have to get it back again to stock Once i return https://zaneqwaeh.jasperwiki.com/6198544/getting_my_downpipes_audi_rs6_to_work