I would still look into the header thing. Mine wouldn't hit until i was turning AND giving it gas at the same time...i could sit in a parking lot and turn lock to lock without it hitting...it took turning and the twisting of the engine under load to cause it to hit, and now that you mention it i specifically remember it hit when turning left because i almost ditched my car turning left into my buddy's driveway because i left off the gas right when the knuckle was on the pipe and it locked my steering up and i couldn't turn at all.