Re: Question about "flashing" the computer.
First of all, welcome to the site. Lots of information here and lots of Diesel Guru's. These guys know there stuff.
Second, if you are not having any problems, you do not need to have yours flashed. Depending on when you actually bought yours, it may have been flashed already.
Basically, you have an 04 built truck with the 03 motor. Don't get too stressed though, there are alot less problem motors than motors with no problems.
Turbo's have lag, but I had more lag when my truck was flashed in July/August. When I put the DPPI exhaust on, it helped the turbo spool up quicker and got rid of alot of it.
All in all, enjoy your truck, mods your considering sound good, everyone here likes them. Bottom line, be very careful about when you take it in for service. If you are not having any problems, make sure it is written on the sheet "NOT TO FLASH MY TRUCK UNDER ANY CIRCUMSTANCES".
Enjoy it, I think you will like it. Hope it helps.
Mine: 2003.25 F-350 Lariat CC, SRW,8' bed, 6.0, Torqshift, Toreador Red, Tan Leather, Trailer Tow, Rhino-Liner, Dee-Zee Platinum Box, Adjustable Pedals, Heated Seats, 6 Disk Changer, DVD, 04 Keypad, AIC, 20% Tint, Escort 8500 X-50, Magellan Meridian Color Gps, BFG 285r17 KM2ís. DPPI Dual SS Turbo Back Exhaust,"X" Springs,Issopro EV Pyro,Trans,Boost,Oil Temp, Water Temp, Volt Meter, Air Press., Viair 550C AC, 26" & 29" Hadleys, 2006 Front End, Chrome Tow Hooks, Warn 16.5ti, Billet Cummins Killer Badges, Int. VT-365 Badges.
Diesel_Mom's: (Redhead): Goodbye 2001 EX, Thanks for 4 years. Brand Spanky New 2005 Eddie Bauer Excursion, DVD, Toreador Red</font> , 6.0L Powerstroke, all options including (3) children, (1) 95# Golden Retriever, Goodyear Wrangler 285 MTRs.