Turbochargerpros.com, is a website that offers a full warranty on audi turbo chargers. I've been wanting to get one for my car once I get reinforced forged pistons. There's no better feeling than having a turbo under your hood. Not only does it make driving a lot more fun, it also improves fuel efficiency, reduced emissions, and gives your engine a lot more horsepower and torgue. By adding hardly no weight to your car increase the power of your engine by over fifty percent. Turbochargers are also very reliable, aslong as you keep it supplied with clean oil. Most mechanics recommend that you use synthetic oil in turbocharged engines. Also, you need to idle your car for a minute or two after running it hard to let the turbocharger cool slow enough so that it won't crack.