Im running the 85mm pulley on my stage 1 kit. I rev to 7.5k almost everytime i drive it with no issues to date, granted i upgraded to a 25row oil cooler to help cool the sc from the added heat. If you want more peak torque i would throw the stock cats on if they arent already, or run a smaller pulley for more boost.
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2012 370z GTM SC
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