ok there we go, i think ive found the right part of this forum lol. ok I have an 08 gxp with just about all the normal bolt-ons like KNN CAI, res delete, flowmaster single chambers with 3 inch tips............but I cant seem to find headers anywhere,do they even make them for that car? also what would be a reasonable upgrade for about a grand? and last if i were to go with 19 inch rims(black with chrome lip) would that hurt the perfomance since it has different size front tires than back