:surviving on a 600RWHP race zed at 1100 KG. :I bought one, but after some reading have begun to doubt if it will actually do the job without twisting into a ribbon. :Comments ?? I dont think ive ever seen or heard of any aftermarket driveshaft fail on a z. Im sure its happened but i wouldnt worry about it. Ive only heard of the center carrier bearing on the stock ones go out. I got mine from shaftmasters but either company is great.