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2013 BRZ 6speed RWD
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Discussion Starter #1
Well while I was installing my UEL borla headers on my SF5, I noticed that there is a Wideband bosche style plug on the first O2 sensor... I asked a friend of mine who tears down a lot of N/A subarus (this is the first N/a ive really tried to play with) and he said that it is really important and that you have to leave that cat there or it runs like crap.

I was going to run a catless system as we dont have emissions where im from but now im thinking twice. Can anyone clear this up for me?
 
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