2001–2002 Audi A4 1.8T Stage 1 ECU Tune (B5) | Boost Dynamic Tuning

Unlock Real Power in Your 1.8T

Stop driving a detuned sleeper — it’s time to let that turbocharged Audi 1.8T come alive. At Boost Dynamic Tuning (BDT), we engineer Stage 1 ECU tunes that transform your car from stock and sluggish into a responsive, torque-packed machine. Our files are dyno-tested, street-proven, and performance-optimized for both power and reliability.

Whether you’re ripping through tunnels or cruising daily, BDT delivers real performance — the kind that sounds wild and pulls even harder. This is the tune your 1.8T should’ve had from the factory.

BDT Stage 1 ECU Tune Features

• Increased horsepower and torque (+105 HP / +117 TQ)
• Speed limiter removed
• Torque limiters raised
• Optimized fueling based on throttle position
• Overrun / crackle tune (optional)
• Refined boost curve for smooth, linear power
• Reduced turbo lag & faster spool
• LPFP & VVT recalibration
• OBDII flashable — no shop visit required
• Award-winning 2-Step & No-Lift-Shift (NLS)
• Mafless tuning & immobilizer delete available

Award-Winning 2-Step Launch Control

Our 2-Step Launch Control is globally recognized for delivering hard-hitting, fireball-spitting anti-lag action. Get ready for jaw-dropping launches and unforgettable sound that defines true performance.

Crackles & Pops (Overrun Tuning)

Add excitement to every drive. On decel or free-rev, you’ll hear crisp pops and crackles that enhance your exhaust note. Mild on stock systems — wild on aftermarket setups.

Boost Control Optimization

From the factory, your Audi’s boost control is inconsistent. Our Stage 1 ECU flash refines it for linear, predictable boost and faster response across the RPM range — perfect for spirited daily driving or weekend track pulls.

Dyno Proven Power Gains

ECU Tune Modification Requirements

Note: If you have an upgraded turbo (K04 or larger), you’ll need our Stage 3 Tune.

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.

By purchasing, installing, or using this product, you explicitly acknowledge and agree to the following terms:

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.

Assumption of Risk and Waiver of Liability

By purchasing and/or installing this product, you agree to:

1. Assume all risk and responsibility for compliance with applicable local, state, and federal laws and regulations.
2. 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.
3. 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.

DOWNPIPE NOTICE: BY PURCHASING A MOTORSPORT/RACING PRODUCT ("PRODUCT"), YOU REPRESENT THAT YOU UNDERSTAND AND AGREE THAT: THE PRODUCT IS NOT DESIGNED TO MEET ANY APPLICABLE EMISSIONS STANDARDS, WHETHER IN THE USA OR OTHERWISE, THE PRODUCT IS NOT C.A.R.B. COMPLIANT, AND THAT THE PRODUCT IS NOT FOR SALE OR USE IN CALIFORNIA, USA NOR ANY OTHER JURISDICTION WHERE THE SALE OR USE IS PROHIBITED BY LAW. BOOST DYNAMIC TUNING, LLC MAKES NO REPRESENTATIONS, WARRANTIES, OR CLAIMS THAT THIS PRODUCT COMPLIES WITH ANY APPLICABLE EMISSIONS LAWS AND EXPRESSLY DISCLAIMS ANY AND ALL SUCH REPRESENTATIONS, WARRANTIES, AND CLAIMS, WHETHER EXPRESS OR IMPLIED. BY PURCHASING THIS PRODUCT, YOU REPRESENT, WARRANT, AND AGREE THAT IT IS YOUR RESPONSIBILITY TO INFORM YOURSELF OF ANY LAWS OR REGULATIONS THAT MAY APPLY TO YOUR PURCHASE AND/OR USE OF THE PRODUCT.