sawmikaze
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- Jan 20, 2016
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How about torque Ryan. 661 usually has higher RPMs, and 660s usually have more low end grunt. 2 ports vs. 4 ports.
A 661 out snorts a 660 by a mile.
I'm gonna try a 661 with just a muffler mod/timing bump and a tightened squish and I'll bet there isn't a ported 660 out there that would smash it in big wood.