Hi I get my pony in 3 weeks but am already busy looking at the parts together. Since I am a beginner here again such a question. Which exhaust system should it be? It is supposed to produce a good to very good sound. Here is the selection a Flowmaster 2.25 inches with 40-er pots, or Flowmaster 2.5 inch 50-er pots. MagnaFlow 15817 stainless steel 3 inches is supposed to bring more performance. MagnaFlow 15815. Does someone drive such a how are you satisfied? Thanks It is about a Mustang 66 Coupe 302 cui 4V .