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Old 06-13-2003, 12:16 AM   #3
Giamilton
Scooby Specialist
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Member#: 8002
Join Date: Jul 2001
Chapter/Region: NWIC
Location: Centennial, Colorado
Vehicle:
2013 WRX 5dr/Abarth
WR Blue/Nero

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The tumbler is to generate turbulence in the airstream at idle and warmup, it's there for emissions.
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