I have a set of injectors out of my 04.5. The bodies have 71k on them and the tips have 15k. New control valves were installed when I bought the flux 2 tips. I replaced them because my truck had a slight rough idle and haze at idle and while driving. After I put the new injectors in I had the same symptoms. I took the TST off I was using for boost fooling and it fixed my problems. I did not have them tested. $1200 shipping included and I dont need cores.