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Old 01-30-2013, 10:30 PM   #2
BlkSlvrdo129
 
Drives: 2008 Silverado
Join Date: Dec 2010
Location: Canada
Posts: 98
I would put it perpendicular to the 1st O2 sensor on bank 1, about half way up from the stock bung and the flange (about where the middle white dot is), assuming there's enough clearance for it at that angle:

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