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Hey, i have a 2006 320i E90 Mspec and im popping a P0430 code Catalytic converter system low effeiceny bank 2' My mechanic reckons i need a new catalytic converter. Im wondering if i can just Straight pipe it. will this mess with the Computer or anything? what does the O2 senser plug into if its just straight piped? Is it even legan in nz? just dont wanna spend 3k on a second hand converter and labour.

Hey, i have a 2006 320i E90 Mspec and im popping a P0430 code Catalytic converter system low effeiceny bank 2' My mechanic reckons i need a new catalytic converter. Im wondering if i can just Straight pipe it. will this mess with the Computer or anything? what does the O2 senser plug into if its just straight piped? Is it even legan in nz? just dont wanna spend 3k on a second hand converter and labour.