Ive just recently picked up my first rotary car an 83 rx7 gsl, ive looked around and cant find anyone with the same exact issue, im getting alot of vibration, even when revving in neutral, and down the highway, and to add to it there is a loud roaring. When i let off the throttle at say around 3k rpm the vibration and roaring sound is almost unbearable, ive read alot about trans mounts, engine mounts, and u joints, but i cant find a situation exactly like the one im having...btw the only mods to my car is weber ida48 weber intake and k&n system...