Sounds like the beginnings of uneven pad deposits (also frequently and incorrectly referred to as warped rotors). What's the mileage on the pads? My first thought would be to re-bed the brake pads since it's free and easy.
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2011 370Z 6MT Sport Gun Metallic | ARC | CJM | Ecutek | FI | Fujimura | R2C | SPL | Stillen | TWM | Z1 | ZSpeed |
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