I just bought a lifted 2001 24v with 120000 miles. In really nice shape. Has banks high ram with heater delete, a 4” banks monster muffler, a lift pump, and I have a fuel pressure gauge set up. Thats all I have really noticed that the original owner has done. I am brand new to diesels so what I have looked up and found out is that I should really look into is buying a fass or airdog fuel pump, a cold air intake, and I would like to eventually have a tuner and monitor, and also maybe a new exhaust (possibly straight pipe). I have been looking into banks cold air intakes, and banks or edge tuners and monitors. What do you guys think I should do? I am not towing anything at all and I would like the truck to have a little get up if you know what I mean.