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Old 03-20-2011, 09:29 AM   #21
Number 3
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Drives: '19 XT4 2.0T & '22 VW Atlas 2.0T
Join Date: Dec 2008
Location: Illinois
Posts: 12,156
The "contraptions" are on the L99 cars to help with AFM. Apparently AFM is more noticeable in a convertible with the top down compared to the coupe so the convertibles get this added in the exhaust.
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