Medium and Heavy Duty
hi all,i have a 2001 international 4900, dt466e, 6 speed,3.91 rear end,11r 22.5 tires dealer won,t reflash compurter for more hp so what can i do to get more power? chips, exhaust or do i live with it.the truck has 205000 miles and runs great empty but when u put 10,000 lbs on it she drops 10-15...