Do wide bands have to have a certain angle or anything? I stuck the bungs a few inches after the lower o2 sensors (in the horizontal section of the test pipes) and about 1/2" higher (so the sensor/wiring would point slightly up compared to the narrowbands). Any foreseeable issues?

 

From an Innovate install manual.

On TURBO CHARGED vehicles:

-Bung: Install the bung downstream from the turbo before the catalytic
converter. The high exhaust pressure before the turbo interferes with
the lambda measurement and the high exhaust temperatures
encountered there can damage the sensor.

-Do NOT install the Bung below the 3 o'clock or 9 o'clock position.
Condensation can form in the exhaust pipe and permanently damage the sensor. 6 o’clock is the absolute worst position to mount the sensor.

-The maximum temperature of the sensor at the bung (the sensor hexagon) should not exceed 500 C or 900 F. If these temperatures are exceeded in your application you should either install a copper heat sink or the Innovate Motorsports Heat-Sink Bung extender (HBX-1).
The bung extender is recommended for situations where airflow is restricted or the encountered heat is higher than a heat sink can handle.

- Note: I used to kill WB sensors within 5k miles of use until I added the recommended heat sink . So far so good.

 

Thanks for the info -- it's about 2-o clock and pretty far down the test pipe towards where the exhaust meets up, hopefully heat isn't an issue.

 

That far down heat shouldn't be an issue since they are designed to be up in the manifold. I think it needs to be 18" or greater from the cylinder head.