Using this Duramax Venom CP3 Conversion Kit is a great way to improve your vehicle's fuel system. First, gather all the necessary tools and make sure you have about 15 hours to complete the installation. The kit comes with everything you need to replace the CP4 injection pump with a reliable CP3 pump. You won't need to do any tuning after the installation. Remember, the conversion is EPA - compliant on its own. But if you make additional changes to the fuel system like using tuners, programmers, or new injectors, it may not be EPA - compliant. Also, this kit can't be sold for licensed California vehicles. As for maintenance, keep an eye on your fuel system regularly. If you notice any unusual noises or performance issues, it's a good idea to have it checked out. This way, you can keep your vehicle running smoothly and avoid costly repairs.