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To me, turn in and grip is what defines "sharp". Better tires can make a pretty big difference in turn in. Stock Michelins aren't bad, but an extreme performance tire can really make a difference. Noise can increase though. Camber also helps, but I thought I would notice a bigger difference than I did going from -1.5 to -2.5. Decreasing unsprung weight is another option but with that you're talking pricey wheels and BBK.
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