The o2 sensors that are used in our vehicles are wide band sensors.
So if you data log or put a gauge on the existing sensors they are extremely accurate.
I'm dumb lol I read somewhere that the longtubes don't have a bung for the o2's. I plan on going catless x pipe with long tubes and wanted to make sure I still had the factory functions, such as the built in wideband in the gauge display..
go with ARH they have all the factory pang and cats extension wire