Yes, you'll be safe to drive without a tune (not mandatory), but a tune would optimize the performance mods you've done, including optimizing the A/F ratios. Typically, people see an additional 10 HP on the top end, but they also notice better torque in the lower and middle portion of the curve.
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2012 GT-R Black Edition Jet Black
2010 370Z 40th Anniversary // SOLD
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