Civic HX : D16Y5 Exhaust : Slambo Wants a Second Wideband O2 Sensor
 

I want to install a second wideband 02 sensor into Slambo to run a dedicated Air/Fuel gauge (largely to monitor Lean Burn) ... but I'm looking at the OEM exhaust manifold and I'm not sure if it'll be possible to drill it and add a bung.

Is anyone running the Magnaflow manifold/cat?

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I'm wondering if it might work for this (could it be drilled on the reverse side?) ... either that or go the header route. I'd like to avoid the expense of replacing the entire exhaust (it's in okay shape) and don't want a flatulent muffler. (We've already trashed one of those.)

If I end up going with a header, I'll spring for before/after dyno tests.

Are you certain you want this? Your HX probably already has two. And the ECU already monitors the AFR on the HX using a wideband sensor. You can read that data using an ultragauge plugged into the OBD2 port. You're already aware of that and there's something else you are trying to do? Run a SAFC2 or some other Apexi or like unit? Sorry, just rying to help...

Yep, the D16Y5 already has two 02 sensors. I have a sweet high-end air/fuel gauge sitting on the shelf. It would be cool if I could simply tap into the existing wideband sensor, but it doesn't sound like that's an option.

The goal is to put the a/f gauge line of sight, while running Dash Command on the JVC flat screen head unit (via AppLink).

I have bluetooth and wifi dongles, as well as a scangauge and hardwire, but how many things can you plug into the OBD port at once? :) (I've never been able to get two units working with a splitter.)