The Nitrous Express Dodge Hellcat / Demon nitrous plate system features Spraybarless technology for the ultimate in atomization and distribution. The billet plate bolts between the throttle body and intake making installation quick and easy. The solenoids are integrated into the plate for a super clean look and easy install. A direct-plug-in Fuel Line Adapter is provided to simplify installation (no need to cut your factory fuel lines). This system includes a TPS Autolearn switch so the nitrous only activates at wide open throttle and automatically turns off when you let your foot off the accelerator.