Quote:
Originally Posted by ZStig
Well for me, I have Euro catless headers and a catless section 1. So I'm pretty sure my NOx emissions are off the scales, and my overall temps are down because I don't have cats.
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Fair enough if smog isnt a concern
however, it isn't the cats that cause an increase in combustion temps. My understanding is that the exhaust gases that get re-routed back into the combustion chamber don't ignite like A/F does, which creates the cooling effect.