I have been going through my Procharged Cobra since January when I bought it and finding various things that needed fixing / correcting. The most recent is that the AEM 30-4100 Wideband AFR gauge is missing the 02 sensor and thus shows a static 14.7. In searching for replacement sensors, I have found various LSU 4.2 on Amazon for about half the price of Bosch. My question is are Bosch the only acceptable sensor to use? I have seen a lot of posts about sticking with NTK for the OEM upstream sensors as Bosch are "crap." So is there good reasons to use an $80 Bosch sensor over a "compatible" LSU 4.2 off-brand at $35? If yes I'll order Bosch, however, I have seen a lot of areas that the cheaper part does just fine. Feedback appreciated!