with the 18's you will need to do the fronts as well.... i have 18's and have gone through this process
2006 WW IX MR2003 BBY EVO VIII (sold)256.9WHP & 277.9torquehttp://s90395832.onlinehome.us/forum//index.php?sid=a70942a7f65043e6c873e12dcd3006921998 Eclipse RS --show car--