Emissions Compliant Tuning

GH Sales, LLC will not:

  • Turn off OBD codes for required emissions equipment that has been removed on any vehicle.
  • Produce tunes that have purposeful elevated emissions such as smoke tunes on diesel vehicles or “fuel backfire” tunes on gasoline vehicles or “cam lope tunes” that create elevated emissions or can damage catalytic converters.
  • Force excessive and early power enrichment on gasoline vehicles.
  • Force leaner than factory part throttle lambda (air fuel ratio) on gasoline calibrations.
  • Change a transmission calibration to allow for excessive “lugging” that creates high load, low rpm engine operating conditions.
  • Disable knock sensors on gasoline calibrations.
Before purchasing custom tuning, please check out these calibration FAQ
Q: Do I really need gapped spark plugs with my EcoBoost tuning?
A: Any power level above the Tow-Safe, your plug gap must be checked and modified (if necessary) to prevent misfires – and even on the Tow-Safe calibration, we recommend checking the gap.
We also highly recommend a heat range 7 plug like the Ford Performance plugs we sell for maximum [insert link on text] pre-ignition resistance.

Q: Will my vehicle throw codes or CEL with your calibrations installed?
A: If your vehicle throws codes with your factory calibration for an emissions-related item, it will throw codes with ours as well.

Q: Will my downpipes/catch can/air filter/etc. cause a code or check engine light (CEL)?
A: If any modification triggers emissions-related codes or a check engine light with the factory tune, it will throw the same emissions-related codes/light with ours as well.

Q: If I install an EGR delete, or other emissions removal parts, will my truck run correctly with your calibration?
A: We have not tested this and do not have an answer for you – we will not sell you our calibrations as such.

We have no problem turning away business for the above requests, and reiterate that all emissions related equipment must be present to properly run our calibrations.


If you have any questions or concerns, please contact us.