Quote:
Originally Posted by jbomb
Has anyone simply removed the Cats on the M5
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I've considered doing that, but want to keep the stock downpipe just in case, so I'm waiting until the aftermarket steps up with the pipe and the software to go with it. All I really want is the modest HP and exhaust tone increase from the cat delete along with elimination of the speed limiter and I'll be happy. Don't need mega HP, and having just enough to leave a stock M5 behind is plenty. And after the cat free downpipe is in I can decide if an aftermarket exhaust is even necessary. The stock muffler tone may change considerably with the cats gone.