The following upgrades were done in 2015. Fuel Injection railsExhaust ManifoldsExhaust SystemABS brake unitABS computerreplaced brake lines with stainless steel line front to rearbrake calipers all fournew GM rotors all aroundreplace idler arm and pitman armnew heavy duty inner and outer tie rodsupper control arms with uniballs6" fabtech suspension liftnew CV axle shafts up frontnew front driveshaftrebuild rear drive shaftKING shocks with reservoirs at all 4 positionsinstall battery box in rear with new optima yellow top deep cyclerewire entire truck system hornblaster train hornfront and rear Road Armor bumpers with AUX lighting and daytime running lights in LEDs38" Nitto tires and fuel wheels 20x10 cranksAMP research power step