Yeah, oxygen ALOT thinner up there. That timing is kinda high I think, I see people usually advance it to 14 or so. I don't know, I can't really say anything though cuz I haven't even advanced mine yet!
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1993 Mustang GT - March Ram Air, K & N filter charger, Pullies, Super Competition Hooker Headers, 2 1/2 in. mendrel bent cat back, High Flow H-Pipe, Pro 5.0 Power Tower
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