heres the thing .... yes, it needs to see both banks .. but i assume its a suspect its a stock manifold? Putting it in the Y pipe AFTER the Cats, is going to make it useless ... Its not going to read any actual AFR.
I run a lc-1 and i would agree it would depend on your setup. Easy way of figuring it out is put it as far back from the headers as possible without going past a CAT. I run mine halfway back on my exhaust but i am T/C and CATless
There's also a cable that allows you to hook the emangle to the lc-1 so it can read and tune itself (i have 1 lying around). but if you would like to monitor then you would need the usb as well.
yes if you havent calibrated it yet, then you will need to before using it. shouldn't take but a couple minutes if wired correctly. and if the serial to usb cable didnt work, you might need to try it on an older laptop. old dells seem to work good for these imo.
You would only need that cable if you want to monitor your readings on a laptop. If you dont plan on doing that, then you would not need the cable.
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