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and my exhaust is restricting the air flow, but every since i replace my 02 sensor, it has been acting up, so i think i got a bad 02 sensor
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so which is the problem? the bad o2 sensor or the stock exhaust restricting air flow?
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I recomend getting a tyfoonmotorsports.com air filter the mesh on the cone on the top is very light and air can get through it alot faster.
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which air filter are you talking about on that site?
and also..i just got my AEM underdrive pulleys intalled...and things seem to be getting worst...can't hardly get to 75-80 mph..
but i did felt a gain in the low end torque...it could be the lack of air coming out..since i have stock exhaust..or might be a bad o2 sensor.