the truck is a 2000 2500 w/ 6.0L. its got 4.10 gears, cai, magnaflow on stock setup.blackbear 93 oct cable tube. running bfg 265/75/16 tkos. my problem is i had a huge drop in mpg a few years back before i started to mod.i went from 13/12 mpg and dropped to 8/7. took it to two dealerships. they could not find the problem. started to mod and got it back to 10 in town/12-14 open road. but i feel like it should be way better than that. i changed front o2s, plugs/ wires, coolant sensor, and a few other things. now im wondering where to go from here. or i would like some tri ys and a y pipe to a 3" out to my magnaflow. would even like to do a cam. i do tow and haul stuff. so it seems low end torque would be great to keep or gain. its a daily driver. 95% driving in town-stop and go...kills me. any imput on what to do or what to look into would be nice. thanks. p.s. love this forum.

 

For a 2500 that's pretty good numbers