i get that feeling too when u let off after accelerating. guess that's just the nature of the engine (or maybe the tranny?). poor engine mounts design on mazda's end.
paired with an aftermarket exhaust manifold, dp, tp, this cbe will sound awesome! pm me to give u some info on how to get this ~$400 shipped new! i'll try to make a video this weekend. my neighbors are sensitive around here.
big turbo, downpipe, test pipe, intake, exhaust manifold w/ ewg, fmic, bov set to VTA, ngk iridium IX, upgraded fp, STOCK TUNE for 6k+ miles.
myth solved.