Custom-car.us is dedicated to pimped out cars and car modifications with instructive guides on modified cars, car customization, car tuning, engine power and engine tuning. We have how-to guides on selecting, fitting and tuning turbochargers, superchargers and NOS; designing and building performance exhaust systems; tuning and modifying EFI, and pimped out cars guides to installing lambo doors, aero and body kits and body detailing. We also offer free modified car wallpapers.