I think this is normal. I hear the same thing on mine. I'm pretty sure there are other threads about this so if you do a search you should be able to get more info.
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2011 Brilliant Silver Touring/Sport/Nav/6MT --- Build Journal
F.I. SS 18" CBE | Takeda CAI | Z1 25-Row Oil Cooler | Swift Springs | Hotchkis Sway Bars | H&R 15mm DRS Spacers F&R | RJM Clutch Pedal | UpRev Tune
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