MSD rpm-activated window switches allows you to take control of your nitrous. You can activate and deactivate circuits at pre-programmed rpm "windows" and they are especially useful for nitrous equipped engines, because the nitrous system can be shut down just before the engine's high-rev limit. They include a ground to activate a circuit, and can handle up to 1.5 amps.
Custom work is needed for this job, you will also need a 6.4 Style Cold air intake or factory intake. Some Tape, an intake manifold, and MOPAR Connector 68064996AA