Re: best filter set up for a 7.3
If you mean AIR filter, probably the best is the Ford AIS. You can get it for $200 at http://www.powerstrokeshop.com
who is also a sponsor of TDS. Much more air, much higher / finer filtration.
You can also make one yourself with the right Baldwin filter and some fittings. Look up the do-it-yourself "DIY intake" or "DIY Tymar" or "Tymar setup" with the SEARCH feature on this site. It'll run you about $50.
After that, you'll have to go with the aFe Stage 2 with the good filter (can't remember the name), and it will run you $400-500. Don't get the cheaper setup of the Stage 2 with the lower quality filter.
1) 2000 Excursion PSD Ltd, 4x2, Dark Green, DP Tuner, Autometer gauges, AIS w/ Zoodad, ITP HP/X, Walker BTM, Dahl 100, Coolant Filter, 203 Tstat, Billet Tstat Housing, AIH delete, Hellwig swaybar, KYB shocks, Amsoil Bypass / fluids, Hutch Mod
2) 2000 Excursion PSD Ltd, 4x2, Chestnut, BTS Tranny, DI 4-Way Chip, AutoMeter CF gauges, AFE intake, Magnaflow 4" turbo back, Wicked Wheel, HP/X Crossover, KYB shocks, Hellwig rear swaybar
3) 99.5 F250 CC SB PSD XLT, 4x2, 3.73 LS, aFe Stage 1 intake, Zoodad mod, 4" turbo back exhaust, Amsoil