How do the companies who make performance parts test it on cars?
One such company has a car of 25yrs of age - the mile displayed on the car is very low - records show higher mileage than that and this company bought it used. One logical explanation is that the current mileage is 999,999 + mileage on the odometer. With that many miles, what is this car good for? It passed SMOG too.
The car is titled to an employee who is the Director of Mkting for three years.
Do they do road test? Or run it on a machine with wheels rotating?