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Top Speed Muffler
Does anyone have a Top Speed muffler or something equivalent on a 2.5 Boxster? I know drone is an issue with this set up on the cars with two sets of cats. I also see a lot of guys saying that replacing the second set of cats with test pipes cuts down on the drone. I guess what I am wondering is, since the 2.5 engines only have one set of cats how bad is the drone?
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