SPC Performance SPC Performance Tandem Shim-FRTLNR 1/8in (100) - 35065 $130.00 These universal shims are designed to be installed on a variety of applications. Use these at the ends of torque rods to change to or thrust angles on Freightliner, Hendrickson and Navistar heavy duty tandem trucks and trailers. You can also use these on... Add to Cart