12:1 AFR on near stock mustang?

Cardinal Sin89

New Member
Dec 8, 2009
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Just recently installed a Cobra intake, 65mm tb, ud pulleys, and I put it on the dyno to see what I gained and at WOT the my AFR was just over 12:1. My car is otherwise stock with exhaust, just wondering if all these cars run rich or if there is something I can do to lean it out alittle.
 
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