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hi briansboxster, i dont know if magnaflow is approved by porsche ,and sorry i dont have any sound files of the exhuast ..i have used there stuff in most of my other cars e.g. mercedes and fords...i love there sound and price...and straight through stainless steel exhuast looks pretty good....i don't have had any complaints in this car or any of my others with them.....and the muffler guy is really good so that also helps....
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