Charge pipe upgrade performance gains are minimal at best. Only reason to upgrade would be to fit an upgraded intercooler or turbo, also different BOV flange options. CVFab has the cheapest catted downpipe by far and I've never heard anything bad about it.Looking for catted Downpipe recommendations and possibly charge pipes. Pros and cons? Been talking to Ortiz performance and said they see nice gains there. Also how much does downpipe change exhaust sound if much.