you got whole thing messed up ady. superstrut is a suspension system. not only the abs. GAB abs with sticker SUPER not necessary it's a superstrut abs.
image below is superstrut abs. totally different from normal abs.
http://www.wheelsjamaica.com/wheels_forum/index.php?PHPSESSID=686d67b2bbf22618d77741b52e9e5392&action=dlattach;topic=10728.0;attach=13839;image
Just wanna ask, what's the max speed that you have done with your stock Z.. i mean completely stock.. no turbocharged or supercharged.. oh well, maybe change of exhaust :p