More Header Trouble

[Tommy_Boy]

After I put headers on my car I kept getting a check engine light with the code p0421 Warm Up Catalyst Efficiency Below Threshold... I'm assuming that the two o2 sensors are all jacked up because there isn't a pre'cat between them anymore.... Should I just get one of them mounted behind my actual Cat?

[Maxx Mazda]

Non fouler or MIL eliminator worked for me.

[Tommy_Boy]

What is that exactly

[bumpin_p5]

What is that exactly
http://www.mazdas247.com/forum/showthread.php?t=123634664
That is the how to on it. I used that method with my OBX Header and never had a problem. I still use it with my new setup, MSP Turbo and still have no problems.