2002–2005 Volkswagen GTI / Jetta / GLI / Golf — Stage 3 ECU Tune

Unlock Real Power in Your 1.8T

Stop driving a detuned sleeper — it’s time to let your turbocharged 1.8T eat. At Boost Dynamic Tuning (BDT), we build hard-hitting ECU tunes that transform your car from stock and slow to snappy, crackly, and full of attitude. Our Stage 3 calibrations are dyno-tested and street-proven, giving you that extra punch, sharper throttle response, and addictive turbo surge you’ve been missing.

Whether you’re ripping through tunnels or dropping jaws at meets, this tune brings the heat. No guesswork. No weak files. Just real performance — the kind that sounds wild and pulls even harder.

Stage 3 ECU Tune Features

• Increased horsepower & torque gains
• Injector calibration
• Speed limiter removed
• Torque limiters raised
• Optimized fueling by throttle position
• Crackle / overrun burbles (optional)
• Refined boost curve — smooth & linear power delivery
• Reduced turbo lag
• Increased low pressure fuel pump pressure
• Variable valve timing recalibration
• OBDII port flashing
• Award-Winning 2-Step & No-Lift-Shift (NLS)
• Mafless tuning option
• Immobilizer delete available
• Off-road only deletes (N80, N249, etc.)

Performance Gains

ECU TUNE MODIFICATION REQUIREMENTS

Emissions Compliance Notice & Legal Disclaimer

FOR COMPETITION USE ONLY — NOT FOR STREET USE

This product is sold and intended solely for vehicles used in closed-course racing, off-road competition, or organized motorsport events. It is not legal for use on any pollution-controlled vehicle operated on public roads or highways, as defined under the Clean Air Act (42 U.S.C. § 7522) and applicable state emissions laws.

Federal and State Emissions Compliance

• This product may modify, bypass, defeat, or render inoperative one or more emissions control devices, including but not limited to: catalytic converters, oxygen sensors, EGR systems, or OBD monitoring systems.
• The installation or use of this product on any vehicle subject to emissions regulations is strictly prohibited by federal law and may result in civil or criminal penalties, including fines up to $45,000 per vehicle under the Clean Air Act.
• This product is not certified by the EPA or CARB, and is therefore not legal for sale or use in California or any state that follows CARB standards.

The U.S. EPA has enforcement authority under the Clean Air Act to pursue manufacturers, sellers, installers, and end-users of defeat devices.

Assumption of Risk and Waiver of Liability

• Assume all risk and responsibility for compliance with applicable local, state, and federal laws and regulations.
• Waive all claims, liabilities, and legal actions against Boost Dynamic Tuning, LLC and its affiliates arising from the purchase, installation, or use of this product in violation of law.
• Release Boost Dynamic Tuning, LLC from any damages, injuries, or penalties resulting from improper or unlawful use.

⚖️ Indemnification Clause

You agree to indemnify, defend, and hold harmless Boost Dynamic Tuning, LLC from any fines, penalties, damages, or legal fees resulting from:

• Use of this product inconsistent with this disclaimer
• Misrepresentation of vehicle use
• Violation of emissions laws or regulations

Final Notice

This product is sold “as is” and “with all faults,” with no warranties, expressed or implied, regarding legality for public highway use or emissions compliance. It is the sole responsibility of the end-user to determine legality of this product for their application.

By completing your purchase, you acknowledge you have read, understood, and agreed to this disclaimer in full. Jurisdiction is governed under South Carolina law with venue in Beaufort County, SC.