man i have been building Z's since i was 14.... i know what i have and what it is able to do on the streets...i AM in the 12 sec range!!!! anybody that know about the Z's is that they run like mid 13 in the quarter FACTORY.... and addin what i have on my car does put it in the 12 sec range IF u know how to TUNE and SET IT UP RIGHT....i dont just put parts on my car and think that im kool and make it SOUND kool...thanks for the help...