im just sayin not all tracks are perfect condition (low elevation low humidity low temp etc..) given the right conditions im sure some of the na's we have out there are running very low 14s and thats not to far off from your Z. i no probably the best posted stock Z is 13.7. i give you props im just sayin their not all their cracked up to be and the styling is poor! and trust me you dont hang with srt's.