Focus Fanatics - View Single Post - FSWERKS race header for my D23 PZEV? (Questions/tune)
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Old 05-16-2012, 07:14 AM   #14
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Quote:
Originally Posted by K26 View Post
You keep the top o2 sensor. Put the wide band after the o2 sensor on install
This, you keep the first O2 sensor, the one that is closest to the exhaust port. The other two on the PZEV setup are for monitoring the Cats. You would add a wideband downstream of the OEM sensor.

Don't know what to tell you about emissions, maybe a fab'd heat sheild that looks OEM?
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