they are shims that come on the leaf pack. i dont know what to tell u other than that they are shims haha. i put the slant on the shim facing the rear bumper, did i do it right? and its the stock driveshaft but should i do anything else about it?
2.5L w/ AX-5, NP231J w/ Rugged Ridge SYE and XJ front driveshaft, open D30 and D35 w/ 4.10 ratio, stock JK 18in wheels w/ Spydertrax 1.25in spacers and 32in toyo at, 2.5in RC lift with .5in shackles(BESRK), rear TJ flares. 8.8 rebuild soon