LOL, either way it won't be a big difference. A 2.80 is about 1/4lb less boost and the 2.65 is about 1/3lb more boost. I'll probably get the 2.65 pulley, my A/F was mid 11's I'm sure there's enough room for another 1/3lb of boost.
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Black 2003 Cobra
Ported, Upper/Lower Pullied, Sprayed......going corn
Slow
2010 BMW 335i JB4-G5iso, DCI, E85
2002 GSX-R600 Full Bolt-ons
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