MK4 GTI / Jetta 1.8T AWP Stage 1 ECU Tune

Unlock Real Power in Your 1.8T

Stop driving a detuned sleeper — it’s time to let your turbocharged 1.8T eat. With Boost Dynamic Tuning (BDT), you’ll transform your MK4 from stock and sluggish to snappy, crackly, and full of attitude. Our Stage 1 calibration is dyno-tested and street-proven, giving you that extra punch, quicker 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 1 AWP ECU Tune Features

• Increased horsepower & torque gains
• Speed limiter removed
• Torque limiters raised
• Fueling optimized by throttle position
• Overrun crackles & pops (optional)
• Boost control refined for smooth, linear delivery
• Turbo lag reduced
• Low pressure fuel pump pressure increased
• Variable valve timing recalibration
• OBDII port flashing — easy install, no shop required
• Award-Winning 2-Step & NLS (No-Lift-Shift)
• Mafless tuning available
• Immobilizer delete available
• Optional off-road deletes (N80, N249, etc.)

POWER GAINS

ECU TUNE MODIFICATION REQUIREMENTS

PLEASE NOTE

: If you have an upgraded turbo, you are not eligible for Stage 2. You must purchase our Stage 3 Tune (includes K04 setups).

? 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 Environmental Protection Agency (EPA) or the California Air Resources Board (CARB), and is therefore not legal for sale or use in California or any state that follows CARB standards.

The U.S. Environmental Protection Agency 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, its officers, directors, employees, and affiliates arising from the purchase, installation, or use of this product in violation of any applicable law.
• Release Boost Dynamic Tuning, LLC from any and all damages, injuries, or penalties resulting from improper or unlawful use.

⚖️ Indemnification Clause

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

• Use of this product in a manner inconsistent with this disclaimer
• Misrepresentation of vehicle use
• Violation of any 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 the legality of this product for the intended application. Boost Dynamic Tuning, LLC does not condone or recommend illegal street use or emissions equipment tampering.

By completing your purchase, you acknowledge that you have read, understood, and agreed to this disclaimer in full. You further certify that this product will be used solely in sanctioned competition and off-road applications.

Jurisdiction: Any disputes shall be governed by the laws of the State of South Carolina, with exclusive jurisdiction and venue in Beaufort County, SC.