Overkill LFX tuning is a performance recalibration of the engine and transmission computers. The benefits of an Overkill tune are straight forward: More power, more instantaneous, improved transmission performance, and proper support for your additional modifications. Whether you're an enthusiast or consider yourself a regular car owner, these are changes that you'll appreciate and enjoy every time you drive your SUV.

  • Horsepower and torque gains of 15-30 on 91 octane and 10-15 on 87 octane anticipated
  • Stronger mid-range power, less peaky feeling to the power delivery
  • Improved throttle response, more natural and consistent throttle feel
  • Increased fuel mileage capability, will depend on your driving style
  • Overkilled transmission revises the part throttle shift pattern will downshift with less throttle input, upshift at better engine rpms, reduce torque converter bogging around town, and improve how the vehicle feels in daily driving by feeling lighter and easier to drive
  • Support for your other aftermarket modifications including our intake system, aftermarket exhaust systems, our 80mm throttle body, JacFab intake spacer and more.
  • Speed Limiter Removal, Engine park rev limiter raised
  • No charge revisions for your future modifications, including no charge for our throttle body upgrades

What you'll get with your purchase:
  • An Autocal handheld tuning device, with software on a USB drive
  • Overkill 91/93 octane tune
  • Overkill 87 octane tune
  • Overkill E85 Flex Fuel performance tuning in each tune (if you have an E85 Flex Fuel ready vehicle)
  • Tuning support for datalogging and custom revisions
  • Tuning support for new mods as you add them, for as long as you own the vehicle

EFI Live Autocal is an easy way for us to deliver your Overkill tune. The Autocal handheld is a handheld you take to the vehicle to read and write the tunes, no laptop required. Our tunes are supplied through email after a quick exchange where you read your vehicle, email us the factory tune file, and receive back your Overkill tunes. The handheld fits in your glovebox or center console to easily switch between different Overkill tunes or return to factory calibration with a few simple clicks and a few minutes. Datalogging (scanning your vehicle and sending the saved file) allows us to dial in your custom tune at no additional charge. Receive updates for new modifications at no charge.
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