Join Date: Aug 2005
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Fordt, the small stack is for a divorced wastegate setup. It bleeds off exhaust before the small turbo to reduce exhaust backpressure. Some guys re-route theirs right back into the pipe feeding the large turbo so they can control how hard it's working and some just vent it into the atomosphere. It's just a measure to make sure the small tubo doesn't get over spun.
The trucks impressive. Looks like it needs some tuning though.