I bought the Dexter EZ Flex Spring Kit and getting ready to install. I noticed it was much heavier duty than the original shackles. One thing I wanted to point out is, the shackles have Dexter's name on the outside and made in India on the inside. Looks like they are outsourcing some of their products and it may have been no big deal but I thought all there products were of USA. If any of you have some installation expertise on these you want to share please let me know. I am going down and buying some 6 ton jack stands tomorrow.