I've run a 14.6 with my JETTA GLX. Only have K&N modified stock air box, and a short throw shifter. Not too bad considering it was the second time out on the track. That and that I cut a horrible .725 light. Fell asleep ... waiting for the spring. Hopefully with a scorpion exhaust cat back or other when I get some better feedback on a better system. DRIVER FOUND EDITION FRANK O