after installing 6112 2inch setting i am having whistle wind noise coming from passenger side front. any ideal?

 

Hmm, that is weird. I didn't experience anything like that. First thing I would do is recheck all your bolts and retoque everything. Is the wine constant or does it change with speed? Have you tried out your truck in 4wd and driving a bit and then back into 2wd? Lastly, is there anything rubbing? Is the fender well liner rubbing?

 

it changes with speed..sound like wind whistling toward A piller on passnager side ..i have 2wd drive..6112 front and 5100 on rear.