YES YOU DO HAVE TO THANK ME FOR READING THIS, PLEASE DO NOT USE SO MUCH OF THE TEXT MESAGE LANGUAGE NEXT TIME!
Matt :)
PS - no the S-AFC is not just thing at your muffler to check out your air flow, its part of the ECU to control your entire system to be able to control it, you have to dyno it so that it will be perform the best...anyway S-AFC II has been out for over a year what made you buy 1?