To tell you the truth I didn't see any improvement in traction when I had 17x10.5 with 315s compared to my 17x9 with 285s now, plus the 10.5" wheel and big tire slow you down on top end. If you already have the 10.5" wheel, then 315 is the right size.
What you need to do is learn how to slip the clutch off the line so you don't break traction.
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Strike down the unroadworthy!
2000 GT Atl. Blue: '03 Cobra motor - 465rwhp/473rwtq, T-56 6-speed, full MM TA/PH & tubular K-member suspension, Saleen body, 17" Torq-Thrust II's, M/T ET Street radials, and lots more
'94 Rio Red Cobra: All the bolt-ons, 3.73s
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