I disconnected my over-the-axle pipe from my mid pipe just to see how it would sound as an "open mid-pipe". One difference aside from sound was a funny "buzzing" or "hissing" noise RIGHT after let off the throttle during revving. What do you think this sound was?? I'm really curious. Also, is it bad for the engine to run with this "open-mid pipe" setup? 2012 GT
, 50K miles, stock power/drive train. Thanks for any input!