Materials and parts are needed to upgrade vehicles. Vehicles need to be upgraded to stay competitive. Make sure to secure all the bonus stars possible from Career courses. This is the quickest way to materials.
Mobile Gaming eGuide - Tips, Tricks, and Strategies for Today's Hottest Mobile Games Asphalt Xtreme
Materials and parts are needed to upgrade vehicles. Vehicles need to be upgraded to stay competitive. Make sure to secure all the bonus stars possible from Career courses. This is the quickest way to materials.