they make your ride very stif, at first you will notcie around a 1" lift, but over time and wear that will go down to around .5". i would look at Ajustable progressive 512s. They can eaither be soft for a nice ride or a stif ride for that extra clearence.
for more info on the 512s hit that in the search bar on this site, piles of info.
for more info on the 512s hit that in the search bar on this site, piles of info.