General Maintenance & Repairs - odd vibration at 1900-2200 rpm

this happens in every gear. car has a built trans, spec 2 clutch, moser 12, long tubes and true duals. and over course i beat on the car. the noise is hard to explain but it sounds like its coming from right in front of my feet or just to the right..... edit(this is only on decel)

same problem here but steering wheel shakes with the decel

engine mounts maybe?

I have the same vibration on acceleration and deceleration as well in the same rpm range. I also have true duals and really think it has something to do with the true duals being mounted on the body of the car causing the vibration at a certain rpm due to the vibration of the motor.

that makes sense...cause it sorta sounds like the exhaust is vibrating