I have had intakes and CBE for a while and never had a CEL come on. I also had test pipes put on and that through a CEL for the post cat O2's but I was uprev tuned the same day and had them deleted so the CEL went out and haven't had one since. I switched from test pipes to HFC's still no issues. So I don't think that would be your cause.
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2013 Ford Mustang GT 5.0 6MT ROUSH intake | ROUSH axle back | ROUSH shift knob | ROUSH coil covers 2009 NISSAN 370Z SOLD
Last edited by redline727; 02-04-2013 at 08:50 PM.
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