Speaking out of turn 9again...0 but the stock battery is 590CCA. So I'm guessing if you went for the 28, you would only give up some reserve. But you save a few pounds 
Marco Tatta
98.5 SE MTX, Duratec
EGR block, fog light
fix, custom shift boot, monsterflow intake, Ecotek valve
Quasi dual cardoctor exhaust.
Hacksaw short shift, Momo race "s" carbon knob, ghetto rear strut bar, 16 inch cougar wheels with 225/50/16 kumho 712s
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