How much do heads affect smog??
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How much do heads affect smog??
I'd like to add either stg1 or stg2 cnc ported LS6 heads or go with some ported stockers in the next 6 months or so. As you can see I've kept my entire car Ca smog legal, and for a reason. Will adding better flowing heads affect my smog in a negative way? I'm not looking to raise compression any by the way...