Off-Road / Race-Use-Only PartsUpdated 16 days ago
Many performance parts are designated as Off-Road Use Only or Race Use Only by the manufacturer.
This means:
They are not legal for use on public roads
They may not meet emissions standards in your state
They may not pass inspections, smog checks, or registration renewals
These restrictions apply regardless of visibility or whether the part “appears stock.”
Understanding Emissions Laws (CARB, EPA, State Regulations)
Different states enforce emissions regulations differently:
CARB (California Air Resources Board) States
California and CARB-adopting states require certain parts to have an EO Number (Executive Order) verifying they are emissions-legal.
If a product does not list an EO number, assume it is not CARB-approved.
EPA Guidelines
The EPA prohibits removing, altering, or bypassing emissions-control systems on vehicles intended for highway use.
State / Local Inspections
Each state may have additional rules around:
OBD readiness
Visual inspections
Catalytic converter requirements
Noise limitations
It is your responsibility to ensure compliance based on your location.
Customer Responsibility
Revline Performance provides product information exactly as rated by the manufacturer, but legality varies by region.
It is the customer’s responsibility to:
Verify if the part is legal for use on public roads in their jurisdiction
Confirm whether emissions rules apply to their vehicle
Ensure compliance for inspections, smog checks, and renewals
Purchase off-road/race-use-only parts with the understanding they are not road-legal
Important Disclaimer
Revline Performance is not liable for fines, failed inspections, registration issues, or legal restrictions resulting from the installation of non-compliant parts. Always consult local regulations before purchasing emissions-related products.