Oct 22, 2010 #1 G gthayley New member Joined Oct 22, 2010 Messages 1 Reaction score 0 Points 1 make it faster? 2500 hd series ,4:11 gears, 4speed with crawling gear . How many horsepower is it stock? How do i get 400 outof it?
make it faster? 2500 hd series ,4:11 gears, 4speed with crawling gear . How many horsepower is it stock? How do i get 400 outof it?