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      12-15-2012, 01:45 AM   #28
aerobod
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Drives: Caterham R500, M2-G87, Macan S
Join Date: Mar 2008
Location: Calgary

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Being a metric car, OD on section 1 & 2 is 60mm (2 3/8"). OEM headers are 40mm (1 9/16").
Appreciate 0