Choose the diameter of ubolt you would like. The 5/8" diameter ubolts are what come stock on this year vehicle and are sufficient for most applications. In high HP trucks and trucks equipped with blocks taller than 7" we recommend that you upgrade to the 3/4" ubolts. Included in the upgrade price of the 3/4" ubolts are new Adjustable Location Top Plates.
Then select what the height of the block(s) that will be used are. This height should be measured at the middle of the block directly over top of the axle. Always round to the taller size if you are in between sizes.
Determine what type of leaf pack you have. A standard leaf pack will consist of a leaf configuration where the top most leaf runs full length from eyelet to eyelet. A standard leaf pack will have a thickness of 2-3". If your pack is thicker than this choose the "top mounted overload option". A truck with a "top mounted overload" will have a small spacer between the main pack and the top overload which is not connect to anything at each end.
All ubolt are shipped in a raw finish. Top plates (when ordered) come standard in a powder coated finish.
THESE ARE NOT FOR THE 2017+ DUAL REAR WHEEL TRUCKS!!