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bmw745ion19s -> RE: The XF Supercharged Is Quite Something...Quick Story and Need Some Help... (6/22/2008 9:07:35 PM)
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one of the techs might correct me but its pretty much when they cut out a piece of the exhaust before and put in another section with a actuator door, door opens and it dumps it, door closed and it goes through cats just like normal exaust, actuator is controlled by a switch, so if they arent open its stock
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