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Old 08-12-2007, 12:57 AM   #2
Scooby Specialist
Member#: 49978
Join Date: Dec 2003
Chapter/Region: NESIC
Location: Shrewsbury, MA
2002 WRX w/ JDM STi
6spd, EJ255, VF39 & EWG


Do you mean O2 sensor? The front O2 (bank 1) is a narrowband. I would suggest putting the wideband in the downpipe, otherwise I believe the EGTs get high enough to destroy the wideband if you put it pre-turbo.
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