I had them on my car when I bought it. Looks like a custom job. Mine was stock downpipe to a 3" high flow cat and 3" all the way back to the muffler and 2- 3" tail pipes. Now it's 3" from the turbo all the way out. Doesn't look like it would be terribly hard to fabricate if you're already going to be doing from the muffler forward. Just buy some mandrel bends and cut and weld.