Chevy Cobalt Forum

hey bro u got a question for you ive a 2006 chevy cobalt ls with 2.2 ecotec with a ton of engine mods automatic my friend david has a 2007 chevy cobalt lt with the 2.2 ecotec 2nd generation automatic all that he has is a cold air header exhaust not even tuned and mine is tuned from a dig we are dead even from a 25 mph roll when he hits 70 mph he just starts walking from like i am standing still what do you think could be happening?