6.4L HEMI

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2011-2021 Jeep Grand Cherokee SRT Tune
2011-2021 Jeep Grand Cherokee SRT Tune
$830.00
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2011-2014 Dodge Charger SRT-8 Tune
2011-2014 Dodge Charger SRT-8 Tune
$760.00
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2011-2014 Chrysler 300 SRT-8 Tune
2011-2014 Chrysler 300 SRT-8 Tune
$760.00

2011-2021 Jeep Grand Cherokee SRT Tune

$830.00 Save $0.00

This is our tried and tested tune for your Mopar. These tunes were designed on a Dynojet dyno and tested in the real world! With months of research and development, you can trust our tunes will give you the most reliable power!

30HP | 30+TQ GAIN

KEY FEATURES:

  • Underground Tuning Device w/ Map Switching From Mobile Phone!
  • Gain up to 30 horsepower and 30+FT/LBs of torque
  • Improved Throttle Response
  • Top Speed Limiter Removed
  • Neutral/Park Rev Limiter Raised to Redline
  • Ignition timing enhancements
  • Air/Fuel Ratio enhancements

OPTIONAL FEATURES:

  • Burbles
  • Advanced Burbles (Requires Stage 2)
  • MDS Delete (Removes 4 Cylinder Mode)
  • Multiple Octane Options (91 Octane & 93 Octane)

MOBILE APP FEATURES:

  • Map Switching From Mobile Device (Apple or Android) 
  • Return to Stock at Any Time
  • Diagnosis & read fault codes from the motor & clear fault codes
  • Data log & record the vehicles parameters and send them back to Underground Tuning

REQUIREMENTS BEFORE TUNING:

  • 2015+ Mopar Vehicles Require a PCM Unlock (Included in the Price). You must remove your PCM from your vehicle and ship your PCM to be unlocked (Shipping Label Included in Price) (Unlocking takes 1 business day once arrived). Once reinstalled, you can tune from your Underground Tuning Device!
  • 2018+ Mopar Vehicles Require a Smart Access Cable to be installed. You will receive a Smart Access Cable with your Underground Tuning Device if your vehicle year is 2018 and newer.
  • PCM Removal Video Link
  • Smart Access Installation Link

STAGE TUNE REQUIREMENTS:

  • Stage 1: Factory Headers & Factory Mid Pipes
  • Stage 2: Aftermarket Headers or Cat-less Mid Pipes

Due to different mods, fuel, & conditions, Horsepower and Torque increases will vary.

2011-2021 Jeep Grand Cherokee SRT Tune
2011-2021 Jeep Grand Cherokee SRT Tune
2011-2021 Jeep Grand Cherokee SRT Tune
2011-2021 Jeep Grand Cherokee SRT Tune

2011-2014 Dodge Charger SRT-8 Tune

$760.00 Save $0.00

This is our tried and tested tune for your Mopar. These tunes were designed on a Dynojet dyno and tested in the real world! With months of research and development, you can trust our tunes will give you the most reliable power!

20HP | 30TQ GAIN

KEY FEATURES:

  • Underground Tuning Device w/ Map Switching From Mobile Phone!
  • Gain up to 20 horsepower and 30FT/LBs of torque
  • Improved Throttle Response
  • Top Speed Limiter Removed
  • Neutral/Park Rev Limiter Raised to Redline
  • Ignition timing enhancements
  • Air/Fuel Ratio enhancements

OPTIONAL FEATURES:

  • Burbles
  • Advanced Burbles (Requires Stage 2)
  • MDS Delete (Removes 4 Cylinder Mode)
  • Multiple Octane Options (91 Octane & 93 Octane)

MOBILE APP FEATURES:

  • Map Switching From Mobile Device (Apple or Android) 
  • Return to Stock at Any Time
  • Diagnosis & read fault codes from the motor & clear fault codes
  • Data log & record the vehicles parameters and send them back to Underground Tuning

REQUIREMENTS BEFORE TUNING:

  • This Tune is PLUG & PLAY! Just plug the Underground Tuning Device into your OBDII Port and Tune From Your Phone! No Unlocking Required For Mopar Models 2014 & Older!

STAGE TUNE REQUIREMENTS:

  • Stage 1: Factory Headers & Factory Mid Pipes
  • Stage 2: Aftermarket Headers or Cat-less Mid Pipes

Due to different mods, fuel, & conditions, Horsepower and Torque increases will vary.

2011-2014 Dodge Charger SRT-8 Tune
2011-2014 Dodge Charger SRT-8 Tune
2011-2014 Dodge Charger SRT-8 Tune
2011-2014 Dodge Charger SRT-8 Tune

2011-2014 Chrysler 300 SRT-8 Tune

$760.00 Save $0.00

This is our tried and tested tune for your Mopar. These tunes were designed on a Dynojet dyno and tested in the real world! With months of research and development, you can trust our tunes will give you the most reliable power!

25HP | 50TQ GAIN

KEY FEATURES:

  • Underground Tuning Device w/ Map Switching From Mobile Phone!
  • Gain up to 25 horsepower and 50+FT/LBs of torque
  • Improved Throttle Response
  • Top Speed Limiter Removed
  • Neutral/Park Rev Limiter Raised to Redline
  • Ignition timing enhancements
  • Air/Fuel Ratio enhancements

OPTIONAL FEATURES:

  • Burbles
  • Advanced Burbles (Requires Stage 2)
  • MDS Delete (Removes 4 Cylinder Mode)
  • Multiple Octane Options (91 Octane & 93 Octane)

MOBILE APP FEATURES:

  • Map Switching From Mobile Device (Apple or Android) 
  • Return to Stock at Any Time
  • Diagnosis & read fault codes from the motor & clear fault codes
  • Data log & record the vehicles parameters and send them back to Underground Tuning

REQUIREMENTS BEFORE TUNING:

  • This Tune is PLUG & PLAY! Just plug the Underground Tuning Device into your OBDII Port and Tune From Your Phone! No Unlocking Required For Mopar Models 2014 & Older!

STAGE TUNE REQUIREMENTS:

  • Stage 1: Factory Headers & Factory Mid Pipes
  • Stage 2: Aftermarket Headers or Cat-less Mid Pipes

Due to different mods, fuel, & conditions, Horsepower and Torque increases will vary.

2011-2014 Chrysler 300 SRT-8 Tune
2011-2014 Chrysler 300 SRT-8 Tune
2011-2014 Chrysler 300 SRT-8 Tune
2011-2014 Chrysler 300 SRT-8 Tune