So i have a 2004 2.5 TS with AEM cold ait intake and Borla "headers" (exaust manifold) for probabally about 7,500/5,000 miles respectively. Car has about 12,500 miles on it and just recently after i started to drive it one day the car started jerking as if a bad 5-speed driver were behind the wheel. It would happen with the slightest amount of gas. I went home, turned off the car, started it again and it wasnt happening. However, from that point on, if i would give the car too much gas it would sound like it misfired or something. I noticed a bolt was missing on the exhaust manifold so i replaced that and it seemed to fix the problem, but today i went to drive again and it was just as bad as the first time. Anybody know what could be the problem??? Please!! help.