Aight so first things first. I went to autozone and got my codes check. It threw like 4 for o2 sensors and catalytic converter and exhaust something- all most likely tied to the fact that I have a test pipe. Not worried about those. But 2 surprised me: engine misfires. They came up on the obd scanner but my car runs fine. Idle is smooth from what I can tell, every couple of seconds though there's a little bump I can feel but the rpms stay the same..But it's very smooth.

Background of the car:
03 Evo 8
Intake
Test pipe
Hallmam boost controller
HKS bov
Walbro 255
Short throw shifter
Upper intercooler piping
It has been tuned
Boost is at 19psi I believe
138k miles

Under boost and driving it doesn't miss a beat, it runs awesome. What could be causing this? I had them clear the codes and will go back in about 2 weeks to check them again.

Second issue, in the passenger side foot well, there is very cold air coming through (not a/c, outside air). I turn the heat on in the foot well and it helps a bit I think, but if the air is off you can physically feel the air is colder down...any thoughts?