2016 Jeep Grand Cherokee SRT, 6.4 L, V8 What we have done: 📍 Unlocked the PCM. 📍 Lifted the idle RPMS. 📍 Optimized the Throttle Body. 📍 Optimized the spark table for LPG. 📍 Removed the factory speed limiter. 📍 Disabled the MDS.