Engine Usage Policy & Legal Disclaimer

Last updated: January 2026

Intended Use

Arthur Gonzalez JDM Engines are sold strictly for the following purposes:

Approved Uses

Replacement of worn or damaged stock engines
Off-road vehicle applications
Show car and display purposes
Educational and training purposes
Restoration projects

Prohibited Uses (Voids Warranty)

Street racing or competitive racing
High-performance modifications (adding turbos to N/A engines)
Commercial racing applications
Drag racing, drifting, or track events
Any illegal street activities

Buyer Responsibility

Important: Customer Assumes Full Responsibility

By purchasing an engine from Arthur Gonzalez JDM Engines, the buyer assumes complete responsibility for:

Installation: Proper installation by a qualified technician.
Compatibility: Ensuring the engine fits the intended vehicle application.
Compliance: Meeting all local, state, and federal regulations.
Emissions: Ensuring compliance with EPA and CARB standards for street use.
Safety: All safety considerations and vehicle modifications.

EPA Compliance Notice

Important EPA Information

Many JDM (Japanese Domestic Market) engines were not originally certified for use on US roads under EPA (Environmental Protection Agency) regulations.

Off-Road Use: These engines may be used in off-road vehicles and applications.
On-Road Use: Customer must ensure EPA compliance for street-legal vehicles.
State Regulations: Additional state emissions requirements may apply.
Certification: Customer is responsible for any required emissions testing or certification.

Engine Testing & Inspection

All refurbished engines undergo comprehensive testing and inspection before shipment:

Standard Testing

Compression testing on all cylinders
Leak-down testing for internal integrity
Visual inspection of all components
Oil pressure verification (where applicable)
Crankshaft rotation check

Available Documentation

Compression and leak-down test results are recorded and available upon request for any engine purchase.

Installation Requirements

Professional Installation Recommended

We strongly recommend professional installation by a qualified automotive technician experienced with JDM engine swaps.

Proper engine mounting and alignment
Correct wiring harness connections
Fluid Specifications: Use only OEM-approved fluids.
Break-in Procedure: Follow standard break-in procedures for new installs.

Installation Considerations

Engine mounts may require modification or replacement.
Wiring harness adaptation may be necessary (USDM vs JDM pinouts).
ECU programming or replacement might be required.
Cooling system modifications may be needed.

Performance Disclaimers

No Performance Guarantees

Arthur Gonzalez JDM Engines makes no claims or guarantees regarding:

Exact horsepower or torque output numbers.
Performance improvements over your stock engine.
Fuel economy changes.
Acceleration or speed gains.
Turbo or supercharger compatibility (unless factory equipped).

Engines are sold based on their refurbished condition and basic operational capability only.

Liability Limitations

Important Legal Notice

Arthur Gonzalez JDM Engines is not liable for:

Damage to vehicle or other components during installation.
Injuries or accidents resulting from engine use.
Violations of local, state, or federal regulations.
Emissions compliance issues or fines.
Performance expectations not met.
Consequential damages of any kind.

State-Specific Regulations

Engine installation and use may be subject to additional state regulations:

California: CARB compliance required for street-legal vehicles.
New York: State emissions testing requirements may apply.
Utah: Local emissions rules may apply depending on county.
Other States: Check local regulations before installation.

Customer is responsible for researching and complying with all applicable regulations in their area.

Questions & Support

For questions about engine usage, installation, or compliance:

Phone: 435-701-8836

Email: info@ajgonzalezjdm.com

Hours: Monday-Friday, 8:00 AM - 5:00 PM MST

We provide technical support for our engines but cannot provide legal advice regarding compliance or installation requirements.