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Old 11-14-2012, 11:47 PM   #21
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Join Date: Dec 2010
Chapter/Region: NESIC
Location: Massachusetts
02 WRX 05 LGT
Slow Automatics


Originally Posted by rocketperson7 View Post
they put it where it is, because the first turbo motor had a cat pre turbo, which would alter the afr if they had the sensor in the downpipe

and they haven't changed the casting since
It would cost subaru nearly nothing to change the location to the downpipe if they wanted to. Its in the uppipe for a reason.
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