they were limited by the PCM - since they were sold with H-rated tires. It the law that you must sell the car with the tire rating it's capable of going. It is also illegal for a tire shop to replace your tires with a different rating - unless they are considered 'seasonal' - like winter tires.SurfjaxLS said:Quik, do you mean the non sports are limited by computer to keep the tires under the max tire speed, or the tires just aren't meant to move much faster then 131.