my son has a 93 3/4 ton 5 spd man-u-al he pulls a 16' trailer to the job site with on a daily basis and a guy told him that a device to increase fuel delivery would really improve his power. as i drive a 03 2500 HO 4x4 HD CTD i have all the power i need so i couldn't answer his question. alright knock off the boos it used to be my truck and i gave it to him when he graduated from college, ok? anyway, any budget (hahahaha) performance mods suggestions would be appreciated. we live in south texas and he actually asked me " whats that electric cord under the hood for".