The z is usually a bit noisier but we don't know the condition of the vehicle what tires are on it and the condition etc. Just because tire kingdom inspected it doesn't mean much because it doesn't mean that they know what they are doing.
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Cobb Tuned | Injen Intakes | Fast Intentions Long Tube Headers | Fast Intentions TDX Catback 18" Resonators CF Mufflers | Tommy Kaira Hebi Bebi Shift Knob | 19x9.5/19x10.5 Five Axis Design S5:F w/ 245/40/19 - 285/35/19 Hankook Ventus V12's
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