F350 with 4.88? Last time I looked, you could only get as high as 4.30. Are you sure you have 4.88? Or maybe you have an F450? Anyway, my programmer is from Spartan Diesel. Really like it. Have 4 tunes, 75, 150, 210, and 250hp. Mostly use the 210, and just started using the 250. The power is awesome! I have the AFE Stage II, with Torque tube, and have not had any problems with it. Alot of people have tho. Think if I had to do it all over again I would get the S&B , or Volant intake. Just check some of the other sites, and you'll find all kind of information on tuners and intakes. Hope this helps.