My concern is More the cyclic loads suspension components have to contend with, rather than a calculated yield point, it wouldn't be too difficult to calculate the yield point of the bolts, even from a simple torque test to yield point, thats if they are not manufacturer published as a matter of course, I would think the info is generally in the public domain, but any installation problems such as misalignment, too short on travel and bump stops and/or bottoming out, or a bending moment applied to the shock body by contact with the a arm as it arcs upwards, a stack up of all these led to Dave's problem on his Porsche Salzburg car were he had to re design his shock mountings, but he overcame his with re engineering the lower mounting and a arm work.
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