Controversial upgrade. I have NST pulley's and I like them, gained power throughout the rpm range. I had them installed with AEM CAI's. Gained 16whp and averaged 7-10whp more across the rev range. I have info on it in my build thread.
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Old Car:GTM TSC'd 550whp / 410lbft tq @ 11.88PSI
New Car: Under Construction
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