EMISSIONS & COMPLIANCE

1. Our position

3AM Tuning performs custom calibration of engine and transmission control modules for GM vehicles. We follow federal and state emissions laws, including the Clean Air Act and applicable regulations enforced by the U.S. Environmental Protection Agency (EPA) and state environmental agencies.

We make no representation that any calibration modification is legal for use on public highways in your jurisdiction. Emissions compliance is the vehicle owner's responsibility, not ours. If you are unsure whether a modification is legal where you operate the vehicle, consult your state's emissions regulations before requesting work.

2. What we will not do

• We will not remove, disable, or bypass catalytic converters, diesel particulate filters (DPF), exhaust gas recirculation (EGR) systems, or other emissions control equipment in a vehicle's calibration.
• We will not create "delete" tunes for emissions-controlled vehicles intended for on-road use.
• We will not disable emissions monitor readiness flags (P0420, P0430 catalyst efficiency monitors, etc.) to mask the removal of emissions equipment.
• We will not tune a vehicle that we know or have reason to believe has had its emissions equipment physically removed for on-road use.

3. What we do

Our calibration work focuses on optimizing the engine and transmission calibration for your specific combination of components, fuel, and operating conditions. This includes:

• Air/fuel ratio, ignition timing, and volumetric efficiency tables for naturally aspirated, cammed, and boosted combinations.
• Transmission shift quality, torque management, and line pressure calibration.
• Flex-fuel and ethanol content (E85) calibration for vehicles equipped with the appropriate sensors.
• Drivability diagnostics and correction of surging, idle quality, and tip-in behavior.

None of these services require the removal or disabling of emissions control equipment. A properly calibrated vehicle should pass emissions testing in jurisdictions where its emissions equipment is intact and functioning.

4. Off-road and motorsport use

Some calibration work is intended exclusively for vehicles that are operated off public highways — for example, dedicated race cars, track-day vehicles, or vehicles trailered to and from motorsport events. If your vehicle is used exclusively off-road, different rules may apply to emissions modifications.

If you are requesting calibration work for a dedicated off-road vehicle, you must inform us of that fact in writing on the intake form or in your initial message. We will note the vehicle's off-road status in the service agreement. You are responsible for the accuracy of that declaration.

5. California and CARB

If your vehicle is registered in California, it is subject to California Air Resources Board (CARB) regulations. CARB requires that aftermarket parts affecting emissions carry an Executive Order (EO) exemption number. Calibration modifications that alter emissions-related parameters may not be legal for use on California highways regardless of whether the vehicle has been tested by CARB.

If your vehicle is registered in California, contact us before requesting work so we can determine whether the service you want is legal in your jurisdiction. We will not knowingly perform work that violates California emissions law for an on-road vehicle.

6. Your responsibility as the vehicle owner

• You are responsible for knowing and complying with the emissions laws of your state and municipality.
• You are responsible for the mechanical condition of your vehicle, including the presence and function of all emissions control equipment.
• You must accurately disclose whether your vehicle has had any emissions equipment removed, modified, or disabled before we begin calibration work.
• If your vehicle fails an emissions test after calibration, the cause may be mechanical (faulty sensor, degraded catalytic converter) rather than calibration-related. We will help you diagnose the cause, but we are not responsible for emissions test outcomes on vehicles with modified or removed emissions equipment.

7. Third-party licensing

Some calibration work requires HP Tuners credits applied to your vehicle's VIN. Once applied, those credits are tied to your vehicle and are non-refundable and non-transferable under HP Tuners' policy. This is independent of emissions compliance but is mentioned here because certain emissions-related calibration changes may be irreversible once committed to the vehicle's controller.

8. Refusal of work

We reserve the right to refuse calibration work if we believe the work would violate federal or state emissions law, or if the vehicle has been presented with emissions equipment removed for on-road use. We will tell you why we are declining and, where possible, refer you to options that are compliant with your jurisdiction.

9. Changes to this policy

We may update this Emissions & Compliance Notice as laws and regulations change. The "last updated" date above will change when we do. It is your responsibility to review this page periodically.

10. Contact

Questions about emissions compliance or whether a specific service is legal in your area? Contact us:

• Email: Joey3AM@3amtuning.com
• Facebook: 3AM Tuning on Facebook