Hello All,
Ok, same old tale I suppose.....I have a OBS 97 F250 HD w the 7.3 PSD. I want to get the horsepower up to 350 or so, but be able to pull my 5th wheel RV (11k lbs.) without hurting the motor due to performance mods. I have a free flow intake, a Banks turbo exhaust pipe, and 4"...