I have a FTI pro brake valve body with HI/Lo feature.Its cast iron version sells for 400 bucks will take 300 to your door. I changed over to new aluminum version This one is almost new the guy I got it from didn't like hi/lo setup and sold it after second weekend. Hi/Lo allows you to leave on transbrake in low as normal or in hi if you opt for it. wydopn2312@yahoo.com or 336 362 1785