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Old 08-14-15, 09:03 AM  
STIGR-Wagon-Dad
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Default Re: Don's 08 STI. STI Hatchback/Wagon or bust!

Quote:
Originally Posted by Noximus View Post
I guess I should have known that considering aftermarket downpipes only have one. Upstream is the one closest to the midpipe then?
Upstream is on the exhaust manifold. It's actually a wideband limited to reading 11.2:1 on the rich side. Very accurate while not in boost.
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