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 A4 goes from stock and sluggish to responsive, punchy, and full of character.

Proven Performance, Dyno-Tested

• Stock (advertised): 180 HP / 173 TQ
• BDT Baseline Dyno: 175 WHP / 170 WTQ
• Stage 1 (BDT): 280 HP / 287 TQ

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

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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)
• Refined boost control for smooth, linear onset
• Reduced turbo lag / faster spool
• Increased LPFP & HPFP pressure
• Variable valve timing recalibration
• OBDII flash at home—no shop visit required
• Award-Winning 2-Step & No-Lift-Shift (NLS)
• Mafless tuning available
• Immobilizer delete available for ECU swap

Award-Winning 2-Step Launch Control

Our 2-step launch control is renowned for hard-hitting, true anti-lag sound and instant punch. Ready to get rowdy? This is it.

Crackles & Pops (Overrun)

Add excitement to every drive. On high-RPM decel or free-rev, enjoy sharp pops and crackles—subtle on stock exhaust, wild with aftermarket systems.

Boost Control Optimization

Factory boost is inconsistent. BDT’s Stage 1 delivers:

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

Result: razor-sharp throttle response and instant acceleration on demand.

ECU Tune Modification Requirements

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

Heads-up: If you’re running an upgraded turbo (including K04), Stage 2 is not compatible. Choose 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

• May modify or render inoperative emissions controls (e.g., catalytic converters, O₂ sensors, EGR, OBD monitors).
• Installation/use on emissions-regulated vehicles is prohibited by federal law and may result in civil or criminal penalties (up to $45,000 per vehicle).
• Not certified by EPA or CARB and not legal for sale or use in California or CARB-aligned states.

The U.S. EPA may enforce under the Clean Air Act against manufacturers, sellers, installers, and end-users of defeat devices.

Assumption of Risk & Waiver

• You assume all responsibility for legal compliance.
• You waive claims against Boost Dynamic Tuning, LLC for any unlawful use.
• You release Boost Dynamic Tuning, LLC from damages or penalties resulting from improper or unlawful use.

⚖️ Indemnification

You agree to indemnify, defend, and hold harmless Boost Dynamic Tuning, LLC from fines, penalties, damages, or fees resulting from misuse, misrepresentation of vehicle use, or violation of emissions laws.

Final Notice

Sold “as is” and “with all faults,” with no warranty of legality for highway use. It’s the end-user’s responsibility to determine legality for the intended application. Boost Dynamic Tuning, LLC does not condone or recommend illegal street use or emissions tampering.

Jurisdiction: South Carolina law; venue in Beaufort County, SC.