IF YOU HAVE A RACE CAR WEATHER IT BE DIRT OR ASPHALT THE CAR NEEDS "SCALED" THIS GETS THE WEIGHT RIGHT OR BALANCE ON THE CAR FOR ENTRY AND EXITING THE CORNERS, PERCENTAGES CHANGE CAR TO CAR AND TRACK TO TRACK AND FOR TRACK CONDITIONS, THIS IS WHERE MOST RACES ARE WON.......... LOTS OF GUY'S CAN DRIVE BUT IF THE CAR IS NOT RIGHT IT'S NOT WORTH A HILL OF BEANS.