Twisted tuning said the R&D for making poly mounts and selling would be to much $$$ and not enough demand to make so he kept costs lower for an all aluminum, the NVH seems to have subsided a little, liveable, but still vibration in steering wheel that I hate...I have bad rear sub frame bushings in rear so that may be contributing to an increased nvh feel, will update when I take care of bushings, not for the faint of heart fix so give me some time
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