Safely add 75 - 125 horsepower to 2005 and newer Chrysler/Dodge Hemi applications. Chrysler's late model Hemi electronic fuel injected engines are the perfect platform for nitrous injection upgrades. The ZEX? Hemi Nitrous System includes all of the parts needed to add anywhere from 75 to 125 more horsepower to your Hemi engine that utilizes the factory fuel injection systems. The ZEX? Hemi Nitrous System comes pre-assembled, making for a simple plug and play installation (four hours from start to finish). For the ultimate in safety, the ZEX? Hemi Nitrous System includes Active Fuel Control? to monitor nitrous bottle pressure and adjust the engine?s fuel enrichment setting so it?s never too rich or too lean. The ZEX?-patented electronic TPS switch uses the engine?s throttle position sensor to electronically activate the nitrous only at wide-open throttle for optimum performance. Designed to work safely on stock type engines, but also engineered to perform flawlessly on highly modified turbocharged and supercharged combination's. Availability: In Stock. All Nitrous systems carry with them a 72 hour shipping delay due to special shipping requirements. Check out the additional accessories below which will really allow you to make the most of your new nitrous system. CAUTIONS: Running Nitrous is never 100% safe for your motor. To increase your safety running nitrous, HHP recommends that you follow these rules: 75 Shot: Run Stock Timing 100 Shot: Retard Timing 4 degrees from Stock 125 Shot: Retard Timing 6 degrees from Stock HHP also recommends that you use the following accessories at the minimum: ZEX Traction Control Window Switch ZEX Nitrous Bottle Heater ZEX Nitrous Bottle Pressure Gauge ZEX Nitrous Purge Kit