Front Truss Upper Control Arm Mount Passenger Side Jeep XJ/TJ/LJ/ZJ TNT Customs. TNT Customs front truss passengers control arm mount comes welded to your truss when you order it at the same time you order the truss. It is made out of 3/16 steel and comes with all the bushings and bolt sleeves you need to connect your control arm to the truss. By TNT Customs assembeling this for you, there is no guess work on your part as to where to put the mount and you spend way less time getting your axle back into your Jeep. CNC cut and precision formed for the perfect fit with your suspension.