Not Ranked
NGK and Bosch are hardly at the beginning of the oxygen sensor learning curve - they've been OE on them for 30 years now. I would venture to say that any info they provide on usage or location would be reasonably accurate.
I use O2 just like any other tuning tool. It lets you quantify where you are, and then you can find out what the motor likes from there - irregardless of the numbers you are reading.
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Survival Motorsports
"I can do that....."
Engine Masters Challenge Entries
91 octane - single 4bbl - mufflers
2008 - 429 cid FE HR - 675HP
2007 - 429 cid FE MR - 659HP
2006 - 434 cid FE MR - 678HP
2005 - 505 cid FE MR - 752HP
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