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      11-13-2012, 09:21 PM   #2
Jamesons Viggen
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Drives: '98 M Roadster stg 2+ S/C
Join Date: Jul 2012
Location: Rochester Hills MI

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My guess is bypass valve- modern turbos have bypass valves which are like a blow off valve that recirculates.
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'98 M Roadster S/C @11-16ps
'06 Saab 9-5 wagon 5mt Aero+ Tuned