Preignition catalytic convertors and gas savings

brh41075 · September 15, 2008, 7:51pm

does anyone know anything about getting a preigntion calalytic convertor that is supposed to increase gas mileage? i was reading preignitioncc.com

Joseph_E_Meehan · September 15, 2008, 11:58pm

Can you say SCA*M ??

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