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Yea i understand that, though until i get the money for a hi-flo cat i was just going to put a straight pipe that my buddly had (wrecked his car). I just wanted to make sure that it wouldn't mess with air fuel ratios and stuff like that...thanks..

And why's that?; "...would send error messages (check engine light coming on) or cause any other problems (mess up air fuel ratios, etc)?"

I have a OBDII B16A and was wondering if putting a straight pipe where the cat. converter is (keeping the ox sensor) would send error messages (check engine light coming on) or cause any other problems (mess up air fuel ratios, etc). Also I assume this would increase performance (why i'm doing...

My car is a 6th gen. civic ex coupe with a B16A from a USDM Si. Last weekend I replaced the timing belt because the motor has about 85K on. I also replaced the water pump for kicks. I noticed when i'm driving at night all the lights; heads, tails, deck, dash, gauges, etc. all dim and then...