Originally Posted by kpbjls1
Yes an open downpipe will cause the boost to spike. Any kind of free flowing exhaust will cause the boost to spike. It would probably be a good idea to port the wastegate and get a boost controller.
so since i really dont have that much money to play with right now... what would be the first thing to do? maybe just get an exhaust system on it? wouldnt that make the boost not spike?
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Old Skool