515 is stock on new 210, (brother just bought one) not sure if 215's would be different. 525 would be next step down, more hole shot and less top end. 653 should shoot you out like a cannon, but lose even more top end. ...and J-Rod, a 911 on a 1:1 Sanger? all I can say is be careful! that thing will turn 6000 rpm in the blink of an eye!
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