No modification needed, easy installation. Come with double-side adhesive tape, just peel and stick. Car exterior decoration, will personalize and beautify your auto. How to install:Choose your application area. Cleaning off the area of application with rubbing alcohol or water. Waiting for the cleaning area dry. Use a hair dryer heat the tape a little. Stick on and keep your car Non-Washing within 48 hours to achieve the best adhesiveness. Note:Remember that there is no water before and after pasting. Note: The product is flat surface. Package Includes:4 x Car Wheel Stickers