As Tested: $63,620Power and Weight: 472 hp • 3958 lb • 8. 4 lb/hpTires: Bridgestone Potenza S001L, F: 235/40R-19 92Y R: 265/35R-19 94YOur initial test of the IS500 exposed a flaw. After six stops from 70 mph and three from 100, the brake pedal felt like we’d stepped into mashed potatoes.
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