I see HP improvements listed for the Smarty tuners but what about the torque? Do other mods like intake/exhaust manifolds & air intake & exhaust systems hinder or enhance the Smarty ratings?

 

i would say any kind of mod to help air in and out of the motor easyer without as much restrictions will increase hp rating and help egt's out big time and any kind of hp increase will increase torque usually if theres like a 20hp increase such as a air intake elbo then the torque is increased by 40ft/lbs torque on a diesel is almost alway close to double of what the hp is