My buddy is wanting to keep it all on. He knows someone that will honor his warranty if factory exhaust is kept on there. Will the truck basically work against itself with a factory exhaust as far as using more D-EF for regens and such?
So what happens with a truck with full exhaust? Does it still regen and need DEF? How will the Dee-P-F clean itself? Will it be more frequent since more hp = more soot.