[Alpine TSi]

As I mentioned above, the M-250 is the same thing as an M-300 but without the display, they run 249 from Mach V motorsports. And not nothing is required to make it seem like a narrowband O2 to your ECU, just got cut and tap into some wiring at the ECU and then you are done. Easier than installing an AFC.

If I remember RS Motors wideband for their dyno is one that only would go into an existing bung, unlike Elite's where it just goes into the tailpipe. Therefore you would either have to weld an additional bung in, or if you don't have your rear sensor anymore and still have an open bung you could do that.