Okay so I got a B16a in my hatch, I have the jdm header down to a hollow cat and an apexi world sport catback, the thing shoots flames out when I redline the gears and sometimes backfires after I get off the gas, I say normal but my freinds say somethings wrong, which is it.

my computer throws a CEL for the secondary O2 sensor about twice a week..anything to do with it?

 

buddy your car is running way to rich check out that second o2 sensor