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I stand corrected. The Sporttech muffler is a hacked muffler. You send them your muffler, they open it up, take out the guts, add bypass pipes (from the inlet to the tail pipe) and reseal. And you get to pay them $500 for parts and labor.
The above option is cheaper than installing a Porsch Sport Exhaust (big $$$$). The Porsche Sport Exhaust utilizes a bypass system that is controlled by a switch and/or speed sensor. But even Porsche does not claim any significant power gains with this mod.
Or you can go to PPBB dot COM and search for "Pedro Sport Exhaust" to see how to have bypass pipes installed on you muffler at a much reduced price.
John
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