Using this VGT actuator is quite straightforward. First, make sure you know whether your 6.7L Cummins engine is from 2007.5 - 2012 or 2013 and later. If it's 2007.5 - 2012, use the HE351 Actuator. For 2013+, go for the HE300VG Actuator. When installing, replace the old actuator with this new one carefully, and don't forget to use the included new turbo to actuator gaskets. As for maintenance, check the actuator regularly for any signs of wear or damage. If you notice any intermittent turbo or exhaust brake failures again, it might be time to have a closer look at the actuator. Keep it clean and avoid any harsh impacts to make it last longer.