I ran closeto that stock. 13.4 in a 100% stock car and i was not good at driving a stick then. I later got my car into the 12's with very little. My boy with his year 2,000 z28 a4 with a borla,open ele-lid,160-t stat and 3.73 gears went 12.8 on nittos. he then got headers,udp and a tune and went 12.4.