NOS makes a great product in the nitrous timing system. You can adjust five different parameters of how the nitrous injects, percentage injected, delay from toggle to inject, final percentage injected, and time the nitrous takes to go from initial percentage to final percentage. The install is easy enough for a first timer, and it will prevent those who are using a massive burst of the juice from grenading turbos. You can literally control every aspect of how the nitrous works with this module. Those using NOS should consider this one. It requires rewiring of an existing system if there exists one, but it's worth the time. It also can incorporate a second controlled stage of nitrous for those who use the trucks to pull so that an extra burst can be injected at a predetermined time.