i would have to agree with everone else... if you like the R1 Drifts (whcih are knockoffs of the PIAA Super Rozzas) i say save up the little extra cash and get the real deal. The quality of product would be way much better and once you see those 18's on the car you will want 19s
edit: FYI the Axis Widetrack's Maxis lip will not fit our offsets unless you shave down the rear caliper.
Do not buy R1 rims for ur IS. the rear stacker rims doesnt fit the IS rear cuz of the offset and it will rub ur brake. i bought a set last year and they are not staggered in the rear. it is sitting in my garage right now, had to take it off cuz it snows where i live