DownThunder is a 4x4 community that helps owners of offroad cars to compare their vehicles with others and find suitable performance enhancing aftermarket parts. Knowledge and experience is shared across the 4x4 Forum while the picture gallery has thousands of images of modified cars to give owners an idea of how they could upgrade and customise their cars. The membership at DownThunder is free and members have the ability to add their own car profiles and add their very own modifications to their profile. A aftermarket parts database will help to keep these profiles up to date with images, descriptions, prices and owner reviews. Members also have access to a Car Logbook where they can keep track of their purchases, services, repairs, recalls and refills.