Good afternoon, I installed in the springs "air cylinders"
This allows me to adjust the height of the clearance
I put myself the first option, but there is more
v.1
http://www.ebay.com/itm/AirLift-Up-Suspension-AirSpring-Air-Lift-Good-Ruber-Air-spring-/152238145029?hash=item237219be05:g:IY0AAOSwdIFX1a4X&vxp=mtr
v.2
http://www.ebay.com/itm/Air-Lift-60744-Air-Lift-1000-Coil-Spring-/252786027083?hash=item3adb38aa4b:g:C84AAOSwtfhYsKrb&vxp=mtr