I am not familiar with harness mount points?Is it possible?

 

using anything other than the stock seat belts w/o a cage or at least a roll bar is very dangerous, especially with the stock seats. if you roll the car and you are straped in with a 5pt harness you wont move and the top of the car will come crashing down on you. in a rear impact the seat back could brake b/c of the extra tension on the back of the seat. its not a pretty site

 

It's possible to put a harness in a Gen5 but yes do not use it for everyday driving. Though I think what fury is talking about is more a frontal crash and having the belts at greater than a 45 degree angle. This (if enough force) causes spinal compression where your momentum is deflected down instead of forward and essentially putting all the forward movement energy into your spine.

 

both of you guys nailed it.