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The cat delete pipes will not affect emissions because you will still have a cat in each of your exhaust manifolds. As for the muffler, look on craigslist. You can probably find a used one for around $100 locally. Then you can do any of the mods talked about on here. A used muffler that has to be shipped will cost because of its weight. I have a used one in great shape that I would sell for $100, but shipping it would most likely cost the same.
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1998 Porsche 986
Threaded Mode
