I spent two days at RoadAmerica on PS2s in my e46 M3 with full track suspension and brakes. They certainly had less traction than my R-compounds, but they held up beautifully. I took out my 500 hp RS6 to Brainerd for a day and beat the hell out of a set of PS2s. I only ended up getting 8000 miles out of the set, but they didn't go away on me and I was drifting the car out of corners, so I wasn't being easy on it.
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