A common NOT so common problem?:

[EvasiveEF9]

Yea I have owned many many ef's and none had this problem.B16's/B18's/Dseries and still nothing.Maybe the problem is the owner strips out the rear mount threads or maybe cross threads it and eventually causes it to fail? I have no clue how but can agree more powerful swap could be the cause but what is the excuse for a Dseries or a rather stock B16?.It really is all too crazy.ahhahaa

Well, no, cuz it's not the teeth slipping out of the mount. It's literally the mount coming apart. The ONLY thing I could think of being user-mechanical error is if the bolt is not fully seated in there, and the female end of the mount is literally ripping in half from not all the teeth being seated. But it would only make sense if it happened once, maybe twice. But if several people are having this problem, this leads me to believe 1) there's alot of dumb people in this world (which I truly do believe) or 2) the car just wasn't designed to have a b-series without a b-series rear xmember like in japan.

[rbf]

But if several people are having this problem, this leads me to believe 1) there's alot of dumb people in this world (which I truly do believe)

I agree.We use correct mounts and never have this problem.