I bought the #10 TST (235 Horse) power upgrade for my 1998 12 Valve Q-Cab, it has larger injectors now. Has anyone have any experience with this update? If so please relay your experience. I have had this truck since brand new and use it to tow a heavy 5er. The truck is a auto trans with with 85k on the clock. I plan to keep this truck cuz I really like. It was a California EGR truck in which I removed the EGR because it is not required here in Lyon County Nevada and I broke two of the EGR tubes. I truck works great I just wanted a little more power for the hills, Thanks for your info. I got a new N&N air intake to put on this week.