I dont own an Xtreme, but I got an S10 with the Xtreme gfx, and no, the flares font look right. they will fit, but they wont go all the way to the botom of the wheel well cuz they are meant to butt up agianst the botom gfx. hope u know what I mean.
They miss the botom of the rocker panel by like 2 inches behind the front tire and in front of and behind the rear tire. another thing is that the inside line on the front wont match up to the bumper line. Xenon sells a flare kit that looks prety tight and would probably be alot cheaper.