first time at the track shifted ~6800 since the stock intake makes no power above that.
got curious, upped my shift to ~ 7300 and picked up 3 mph. So since then I shift at that rpm. But at that rpm I would be more comfortable with good oil pump gears and an ATI harmonic damper. But since I don't really race that much...meh.
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2011 Mustang GT Grabber Blue
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