Honestly they look weaker when put next tot eh stock ones...they are actually alot thinner...but of course the whole purpose of the Amazon ones is the material and believe they are heated to be stronger..
Broke a stock one this past Spring after 30 or so passes and lots of hop. Bought upgraded ones from
The Driveshaft Shop for $549 + the assembly fee ( I forget how much) + shipping. I've made 50 or more passes on those with a lot more power to the rear wheels and they're holding up so far. I still have some hop (installed bushings/shocks), but not as much so it's hard to compare.
btw...DSS customer service was awesome and the shafts came fully assembled, ready to pop in place.
This might be a big issue for me pretty soon about the IRS. I am probably going to go KB in the next month or so (Strictly Pro). Just saying that you would want to keep the IRS with the KB. What is the best set up you can run, as in changing shafts, bushings, shocks, ect so that you won't have the problems of braking parts on the IRS. I know that there is alot of aftermarket parts for the IRS but are they really worth the money to spend. I already have an 8.8 just in case. But would like to get some feedback about what you guys would suggest about making the IRS stronger or better for more power.
My brother broke one of mine the first time he tried to lauch my car. They had maybe 6 passes on them. Replaced with stock. Ran about 50 more passes (very little hop, light launch, 2.1-2.3 60's). Went to Nittos. Broke my Diff in half. Halfshafts were fine. Made about 50 more passes and broke all kinds of $hit, but the halfshafts are still good. Making "no hop" launches, slipping the clutch, running 1.8-2.0 60's. Now my hubs are going out. Going to torque them down this weekend. Halfshafts are still fine though.