Improve your truck's ride. In this video I show the difference between how a stock shackle and the upgraded sulastic shackle handle going down the road. This was a noticeable improvement to my ride quality, I think it is a good way to take the annoying bumpiness out of your heavy duty truck. The instructions Sulastic provided were really thorough and it all went very smoothly, but do be aware that you need some above average tools for this job: floor jack, jack stands, die grinder, and then some larger sized sockets and wrenches. An impact made it faster too.
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