I dont know if i ever posted this up here but as soon as i got my car back from getting my headers installed i get this annoying sound once i go over 2,000 rpm, It sounds like crickets or something. So could this be a exhust leak and if soo how can i tell what do i need to locate it ? These are slp headers, yes many people have said that they had their headers make a tin like sound come from them but those were back when the cross over pipe was ceramic coated also. But thats the ony thing bugging me. Well one other thing, it was raining out today soo their was fog on the windows and my defroster dont work for crap on the windows, no hot air blows out of the heater but it does warm me and the car up just fine but you just cant feel the air blowing out. I replaced the blower motor last winter but i remember oneday it went pop and i smelld something a day or so after putting the new one in soo maybe i killed it, but i dont really care about tht right now i just wat that annoying sound to be fixed.