can anyone tell me why there arnet many choices for 4 in kits for the o4 trucks,, there all 6 in,,, id love to have the 6 in lift but i have to get it inspected and it might be to high for maine laws... although the pics on here with just 6in lifts dont look that high,, but im sure there higher in person..

 

I'm sure it's just supply and demand. More people want 6 inch kits. I'd suggest the RCD lift. It is adjustable for 4.5 or 6 inches of lift by spring preload.