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I had CP-E resonated mid pipes on an otherwise stock exhaust system, it sounded decent, a bit throatier and louder but not by too much. No noticeable drone IIRC.
my Butt dyno didn't notice any difference in performance but this might have been because the car was FBO and had just been put back to almost stock to get a new HPFP. lol car felt pretty soft after having driven it with 100+ more hp.
Car was an 09 w/N54
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U WOT M8? |