I contact Toytec
about thier lifts within my budget and threw in the Radflo set up too and this is what they had to say:
It sounds like you are on the right track and i don't think you can go wrong with any of those options. I will highlight some differences for you between those kits
Ultimate Lift: This is already assembled and uses Bilstein shocks. The front coilovers have a threaded sleeve that fits over the shock which means you can adjust it from 1-3 inches of lift and anywhere in between. This kit is works really well if you are planning on adding weight in the future since you can turn the adjustment up once you add the weight and not have to disassemble the front shocks and/or swap to heavier springs
The BOSS system is pretty much the same as the Ultimate with the exception of the front coilovers. We build that shock ourselves and we tweaked the valving to ride better and have more control over bumpier terrain. The shock also has a larger diameter shaft so there is a significant increase in strength and it is rebuildable as well. Instead of a threaded sleeve on the shocks like in the Ultimate, the shock body itself is threaded which is easier to adjust.
The Radflo's are more of a high end race style coilover. They will perform better under high speed offroad situations but they do require more maintenance than the Bilstein's that are used in the Ultimate Lift or the Boss kit. Bilstein's are a maintenance free design where the Radflos require rebuilds periodically. The BOSS coilovers are rebuildable but do not require it as often as the Icon or Radflo setups would. However it all depends on how the truck is used. If you truck sees a lot of heavy offroading, the Radflo setup would be my recommendation. Otherwise I think the BOSS or Ultimate would probably be a better fit.
Let me know if you have any other questions
Sales and Tech Support Manager