by created I assume you mean joined
personally I would by any exhaust bits from a trader on the forum. You will get great service and helpful info from the traders who all have a good reputation. I would recommend Mitz from cougar store, looking at what your looking to spend. He also has a workshop so ohe can fit the stuff as well.
TBH the main exercise for exhaust change is noise. Unless you are going to have a remap done.