Ive had the nismo header on my car for about 3 weeks now and im getting tired of the ses light, gonna order the 02 sim to fix it but i just wanna know if the ses light has anything to do with upsetting the timing? I was just at the track last night and ran the car a couple times and the best i could manage were 15.2-4's with a good reaction time .2-3 and the car is supposed to do 15.2's stock from what i understand. Ive put on an injen cold air, nismo header (w/o cat), jwt bsr kit, and a greddy evo2 exhaust and i think i should at least be able to break 15's. would this help my times or do i just need more practice driving it?