well..seeing that everybody else that had a vibration when close to 60mph and did a tire balacing and all of that..it all points to the shaft..wich one is the best pick on the market..is it the z1motorsports one..93 NA 2SEAT

 

If your going to be doing it anyway, may as well upgrade to their 1-piece.....Z1's will work just fine.

 

Just ordered mine two days ago from Z1, when it comes in and put it on I'll upload pic's