bjuice

cold outside air being pulled in from the outside.check all your collectors,header flange',collector flanges...check your primary header tubes for small cracks and breaks,,,,,,,,if your exhaust has an exterior leaks it (exhaust) will act as a vaccum and pull this outside cold air in causing the disturbance of the hot flowing air in the exhasut ...therefore making a backfire sound...please check your exhasut with a magnafying glass if you must..your problem will be in your exhaust somewhere.


Brian