It is only a theory why the bolts keep breaking on my car. Maybe the grade 8 will as well, time will tell! I tend to not push the car in corners because, well, it tend to push in corners, lol. It is not a corner carver, that's for sure. Thing is, it had the original links when I bought the car in '87 (at least they looked original)with 72,000 miles, and when I took the car apart starting in 2002, the same links were still in there. Never broke either of them a single time. Since I put replacements in, bolt breakage is a thing. Not a big deal I suppose, it's only the sway bar and not a critical suspension piece but still..............
I ditto the heim joint on the street thing. Certain newer vehicles now have heim joints in the rear suspension (Taurus and last version Explorer for example) at the knuckle to upper arm connection. At first glance they look like a standard suspension bushings but internally it is a heim joint. Even though they are weather sealed, we are forever replacing them due to becoming loose. Not just a little loose, a lot loose. Wouldn't be so bad except they're pressed into the rear suspension knuckle and are a really big PITA to change. When I say press in, I mean PRESS in. I swear the outer shell is 6 mm larger than the bore it goes into. Depends on the type of driving and where the driving is done but life expectancy is anywhere from 30,000 to 100,000 miles.