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So since I already have the 75hp kit and pfadt headers with your tune, what kind of increase should I expect going to the 18% pulley and injectors?
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2013 Ashen gray ZL1 M6 with Roto-fab, Vmax TB, Pfadt headers, 10% pulley, JRE tuned. 11.459 @125mph. 566hp/517tq. Sold due to not enough seat belts. FML.
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