how fast?> depends, i could go really fast if i rode with mine low to the ground because it doesnt bounce as much or sway, but my front bumpers so big, that like ruins it for me, so im thinking about getting air struts from air ride technologies, there suppose to be for "handling, and speed...." so they say, if there crap they better believe there goin back. there supposed to be released soon, ima check em out.