I currently have a 6" Fabtech lift kit on my 2008 h2 and I was wondering if I was able to install a Leveling kit (Keys up front and a spacer in the back), would the two lifts be compatible together without having to change anything else and would they give me another 2" of a lift? Thank you in advance!

 

Truck suspension lift kits and leveling kits are not designed to be stacked together because they are designed for purpose, to accommodate suspension angles and vehicle weight as a direct pressure etc. No truck leveling kit, even within this particular custom lift kits sub-category, is designed to be compatible with another. And, you especially wouldn't want to risk this driving down the highway! I have also checked with two engineers for you on this matter and one of them works for Supreme Suspensions, so she specializes in truck leveling kits.