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The internal mod has no drone. It is also free if you know how to weld. If you don't know how to weld a muffler shop can weld it back up for not much money. Even with the stock cats the sound is great. Even better if you live in an area that doesn't like modified exhausts, it looks totally stock. My friend has the Fister mod and my internal mod exhaust sounds very similar.
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1998 Porsche 986
Threaded Mode
