Hi,I am a proud owner of a white jdm gt4rc.When i bought the car,the previous owner put in a 95 MR2 3sgte,FMIC,Blitz boost controller,turbo timer and HKS BOV.The car runs great but i have a couple of issues that i need help with.When I first drove the car,there was a drone noise comming from the front of the car.Right away,I changed the front bearings.Noise gone. Now every time im in any gear,past 3000rpm,I have a bad vibration comming from driver side floor.It goes away past 3500rpm and higher.But anytime it goes down 3500 to 3000rpm vibration comes back. I've checked all my work and nothings loose.I'm wondering if anyone has had this problem before and how to fix this .another issue is when i let off the throttle,i hear a clunk.I asked the previous owner about the mounts,he said they were ok(he's a mechanic).Do all mounts new or used that soft?I've seen the poly mount repair,i live in a townhouse,they wont let me do any work on my underground.Has anyone done a engine dampener before?Any help would be GREAT.THANX