REAR BRAKES AND SUSPENSION MODS
Due to the use of polyurethane bushings some have been unfortunate to discover that the increased vibration works the nut loose. Well the kit includes a flex top lock nut tightened down to the first nut to double insure the nut never backs off. Thread locker compound can even be applied. This lock nut is not Ultra-coated. It has a castle like top that spreads out as it is threaded on doing what typical ny-lock nuts do but it is reusable and provides more clamping force. It is not grade 8 but does not need to be. The first nut is taking care of that. Normally stainless is great! There are even grade 8 stainless bolts out there, but here is a unique situation. Suspension bolts are exposed to road salt, more so then say engine bolts or interior applications. Here is the problem with stainless steel when pressed together with anything causes an airtight surface on the stainless. Such as the space between the bolt and a washer or the space between threads. In this air-deprived region especially when chlorides are present, the stainless is not allowed to produce its protective layer of naturally occurring oxide. Then the chlorides attack the stainless steel causing pitting. This does not take the form of rust and this is not noticeable because you can not see it until the torque is reduces because of the loss of material then the bolts work loose. Stainless is not the way to go in an environment where it is common to use road salt, period. This is a very durable coating AKA armor coat. It is over cadmium-plated hardware.