Okay fellow members, I need some input, please. In my quest to squeeze out a bit more performance from my 09' 950t, ive found some aftermarket exhaust, and air filter kits that provide what I'm looking for. However, several of the fuel processors won't work if my factory 02 sensor and catalytic converter are still in place. Would removing either, or both, cause any unforeseen issues now or in the future? Thanks for listening!