2002–2005 Audi A4 1.8T Stage 1 ECU Tune (B6)

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’s Stage 1 ECU calibration, your Audi transforms from stock and sluggish into a responsive, crackling, torque-packed beast.

Proven Performance, Dyno-Tested

• Stock Advertised: 180 HP / 173 TQ
• BDT Baseline Dyno: 175 HP / 170 TQ
• Stage 1: 280 HP / 287 TQ

That’s a massive gain of +105 HP and +117 TQ — the numbers your 1.8T should’ve had from the factory.

Stage 1 ECU Tune Features

• Increased horsepower & torque output
• Speed limiter removed
• Torque limiters raised
• Fueling request optimized by throttle position
• Overrun crackles & pops (optional)
• Boost control refined for smooth, linear onset
• Reduced turbo lag with faster spool
• Increased LPFP & HPFP pressure
• Variable valve timing recalibration
• Flashable via OBDII port — no shop visit required
• Award-Winning 2-Step & No-Lift-Shift (NLS)
• Mafless tuning available
• Immobilizer delete for ECU swaps
• Off-road calibration (N80, N249 deletes, etc.)

Award-Winning 2-Step Launch Control

Our 2-step launch control is world-renowned, delivering the hardest-hitting, fireball-spitting anti-lag action. If you want rowdy, chest-thumping launches and ear-shattering sound, BDT’s 2-step will turn heads and set the streets on fire.

Crackles & Pops (Overrun Feature)

Add excitement to every drive. On decel from high RPMs or revving in neutral, you’ll hear sharp, aggressive pops and crackles. Subtle on stock exhaust, wild with aftermarket systems — your Audi will sound as good as it feels.

Boost Control Optimization

From the factory, the ECU’s boost curve is inconsistent. BDT’s Stage 1 ECU tune delivers:

• Faster turbo spool
• Linear boost delivery
• Consistent power across the full RPM range

The result: razor-sharp throttle response and instant acceleration whenever you need it.

ECU Tune Modification Requirements

• Air Intake: Recommended
• Intercooler: Recommended
• Drivetrain Inserts: Recommended
• Downpipe/High Flow Cat: Recommended
• Upgraded Diverter Valve: (Required)
• Spark Plugs: (BKR7EIX .028 gap required)

Please Note: If you run an upgraded turbo (including K04), Stage 2 is not compatible. You’ll need our Stage 3 ECU 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.

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

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

• 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.