Re-Tune/Tune Update Wrangler 4L HEMI Engine

4L HEMI Engine

Optimize your vehicle and gain more power and performance

windows down and a soundtrack of engine rumble

This is our tried and tested Chop Pack for your Hellcat

Superior short pulse width control and state of the art matching make these injectors easy to tune and provide great drivability

Re-Tune/Tune Update Wrangler 4L HEMI Engine*ONLY FOR CUSTOMERS WITH AN UNDERGROUND TUNE ALREADY INSTALLED IN THEIR VEHICLE* Installed a 180 Thermostat, Throttle Body, or Other Mods? Optimize your vehicle with a Re Tune! Required if you purchased a tune over 30 Days Ago. Does Not Include Cams, Injectors, or Added Force Induction. For more questions, please email us at sales@undergroundtuningusa. com Does Not Include Burbles, Advanced Burbles, Super Burbles, Transmission Tune, Or MDS Delete This