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· TwiztidKidd
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888 Posts
I've never ever seen my B13 throwing any light ever, but I changed the original O2 sensor after 90k miles... A heated sensor will last you 100K miles max. Get the NGK sensor for 45 bucks... fuel economy has improved a lot ever since I got it. I dunno why the hotshot header gets a reading off of cylinder no.3 only (that's just not right) when the stock manifold is designed so the O2 sensor sends a feedback on all cylinders. Why is cylinder no.3 so special ?

 
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