This has been discussed in other threads. Please use the search option in the toolbar above to find information. Many people have dual exhaust on their 'tecs, with some putting Flowmasters or Dynomax turbo mufflers on them. I will be doing this sometime soon (I have the mufflers, just need my gf's dad to get his garage in order after his move). I don't think cutouts would sound very good. I think it would decrease the power of the engine, and would sound very raspy.