what level do most of you run 03 's and early 04's on?what level do they come on out of the box. has anybody found a level that will improve any milage , towing or unloaded?
are the egt's managable with the 305 555 motor with air and exhaust mods only on some of the lower settings?
are the egt's managable with the 305 555 motor with air and exhaust mods only on some of the lower settings?