Either a nasty, nasty modded 660 or a El moobs 064. But probably both
I owe @David Young a 660 with the works. I was pretty happy with my Chinese 660 from a performance standpoint. Fingers with 288 piston. So I'll do the same with an OEM jug. Try some things that I'm thinking will make it even better. But why not slap a K&N setup on it
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