Emissions & CARB Compliance Disclosure

Last Updated: 2/1/2026

Overland Tailor Tuning (“OTT”) is committed to transparency regarding emissions compliance and regulatory requirements related to aftermarket automotive tuning. While OTT WILL not delete any emissions-related systems or provide calibration-related services to any vehicle without all OEM emissions devices or replacement parts that hold a valid CAEB EO, it is important to understand how this applies to you. 

This disclosure is intended to clearly explain how emissions laws may apply to OTT products and services.

1. General Emissions Notice

Aftermarket ECU tuning and vehicle modifications may affect emissions-related systems and vehicle compliance with federal, state, provincial, or local laws.

It is the sole responsibility of the vehicle owner to ensure that any modifications, calibrations, or tuning services comply with applicable emissions regulations in their jurisdiction.

2. CARB Executive Order (EO) Calibrations

Some OTT calibrations may be covered under an active California Air Resources Board (CARB) Executive Order (EO).

When applicable:

• EO-approved calibrations are legal for use on public roadways only for the specific vehicle configurations listed in the EO

• The EO number must match the vehicle’s:

  • Model year

  • Engine

  • ECU family

  • Emissions system configuration

EO coverage does not automatically apply to all vehicles or all OTT calibrations.

OTT will clearly identify when a calibration is EO-approved.

3. Non-EO / Off-Road Use Calibrations

Any OTT calibration not explicitly covered by a CARB Executive Order is:

• Intended for off-road, racing, or closed-course use only

• Not legal for use on public roadways in California and certain other jurisdictions

Installation or use of non-EO calibrations on emissions-controlled vehicles operated on public roads may violate emissions laws.

4. Dealer & Inspection Considerations

Vehicle manufacturers, dealerships, and inspection agencies may:

• Detect aftermarket tuning

• Deny warranty coverage

• Fail emissions inspections

• Refuse to perform software updates

Returning a vehicle to a stock calibration does not guarantee emissions compliance, inspection approval, or warranty reinstatement.

5. Remote Tuning & Customer Responsibility

For remote or self-install tuning services:

• OTT relies on customer-provided vehicle information

• ECU identification and compatibility must be confirmed prior to tuning

• Incorrect information may result in unsupported or non-compliant calibrations

• Changes to vehicle systems after tuning will VOID any CARB EO and are the responsibility of the registered owner

OTT is not responsible for emissions violations resulting from inaccurate vehicle data or misuse.

6. No Legal or Regulatory Advice

OTT does not provide legal or regulatory advice regarding emissions compliance.

Customers are encouraged to consult:

• State or local emissions authorities

• Regulatory agencies (EPA, CARB)

• Qualified emissions or legal professionals

7. Customer Acknowledgment

By purchasing or using OTT products or services, you acknowledge that:

• You understand emissions laws vary by jurisdiction

• You are responsible for determining the legality of use

• OTT is not liable for emissions violations, fines, penalties, or inspection failures

8. Questions About EO Status

If you have questions about whether a specific OTT calibration is CARB EO-approved for your vehicle, please contact us before purchase with:

• Vehicle year, make, model

• Engine and transmission

• ECU ID

• Current modifications

Contact:
info@overlandtailor.com