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Mine, 2001 S, reads +3 mph over the actual at all speeds and confirmed by GPS and Radar.
It helps me avoid speeding tickets so I can overshoot a bit....oooops did 95 on the highway on-ramp getting in front of a truck this morning....thrilling!
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"It broke because it wants to be Upgraded  "
2012 Porsche Performance Driving School - SanDiego region
2001 Boxster S, Top Speed muffler, (Fred's) Mini Morimotto Projectors, Tarret UDP,
Short Shifter, Touch Screen Dual Din Radio, 03 4 Bow glass Top (DD & Auto-X since May 17,2012)
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