OK, so i bought a 2005 3500 qc dually 4x4 6spd a couple months ago and it never seemed to run even close to what my previous 2005 2500 qcsb 4x4 auto would. I knew I had leaking seals on the turbo and just swapped it out with a secondhand garrett that was built by tom at turbo re-source. Supposed to be a stage 3 non gated with a .89 exhaust housing. All this time the truck had a egt guage but the lazy previous owner never installed the probe so i did that when i did the turbo. I'm thinking it may have sticks or nozzles just because when running about 65-70 in 6th I don't have any problem hitting 1200*.