-06 torsion bars,keys,bolts or something else different than -03 ?

[Hammer]

height is from ranchos 4" lift installation manual for Hummer H2 !

[Hammer]

If I adjust it back to ranchos recommend I have 5.5" more height at the back when rear air suspension activated .

[SummitUp]

Are you saying you are able level front to rear by raising the front 5.5" by cranking up the stock torsion keys? (I wouldn't think this possible). If you are, no wonder you are experiencing a harsh ride and this is NOT advised. You will be changing the front suspension geometry and putting a lot of stress on the UCA ball joints (UCA = Upper Control Arm) among other things.

Read <THIS ARTICLE> to get some insight to the geometry of the GM front suspension. This doesn't really apply in your case considering you've already lifted your ride, but it will give you an idea of what happens when you crank your torsion bars.

[Hammer]

I can gain approx 2.5" more from 28.5" to~31" from center to fender . we have very bumpy roads here so it really makes difference how torsion bars are adjusted for example at this height (30.5"center to fender) way too stiff...

I know that article but thanks alot very good information.

Cognito leveling seems to be only good front leveling kit but I dont know will it work with rancho 4" lift they do have also new upper control arm kit for lifted applications but it doesnt give more lift I think. I have send them email but no answer yet ...

[Hammer]

Ranchos kit doesnt come with new upper control arm. I think cognito kit might work but I´m not sure at all...

[Hammer]

Cognito
upper control arm.

[Hammer]

cognito

I would be more than happy to gain extra 2" front lift but would not like to lose comfort ride....