Haven't considered it. Not sure if there's enough benefit for the cost. Doubt you'd get any significant quarter mile performance gain that couldn't be attributed to variation in driver inputs.
Also should consider any drone from exhaust systems on highways at the higher rpm.
Would be curious to see someone do it, though.
White Hot, Onyx/Red, M6, Sunroof (#431/1829)
Doug Thorely long tubes, Vararam intake, EFILive tuned.