2017–2020 Audi A4 / A5 2.0T TFSI — Stage 1 ECU Tune

Your B9/B9.5 Isn’t Slow… It’s Just Factory-Choked ?

Audi built the B9/B9.5 2.0T to be smooth — then they tuned it like a lease return. BDT Stage 1 is the “factory-fix” your A4/A5 should’ve shipped with. Expect harder midrange torque, faster spool, cleaner pulls, and instant throttle snap… without turning your daily into a drama queen.

Refined when you want it. Optional crackle in Dynamic/Sport when you don’t. ?‍??

Fitment & Compatibility

Why Boost Dynamic Tuning?

We don’t sell mystery files. We build results. Every BDT calibration is developed in-house, refined on real vehicles, and protected by factory-style safety logic. No copy/paste maps — just clean power, smooth drivability, and repeatable performance you can trust.

Stage 1 Features — B9 A4/A5 2.0T

• Dyno-tested gains: up to ~282 WHP / ~360 WTQ on premium fuel
• Boost & torque strategy reworked for a harder midrange hit
• Sharper throttle response + faster spool (less “factory delay”)
• Speed limiter removed • Neutral/Park rev limiter raised
• Torque limiters raised for stronger pulls
• Fueling strategy optimized by load & throttle
• Boost gauge recalibrated to display higher boost
• Optional Overrun / Crackle Pops (Dynamic/Sport only — by request)
• Refined boost control — linear onset + smoother long-pull stability
• LPFP / HPFP targets optimized (within safe operating logic)
• Variable valve timing recalibrated for stronger, cleaner power delivery
• OBDII port flashing — no ECU removal required
• Auto Start/Stop defaults OFF (still functional via factory button)

Dyno-Verified Power Gains

Stage 1 power (SEO quick view): up to ~282 WHP / ~360 WTQ on premium fuel. Results vary with dyno type, altitude, temperature/heat-soak, fuel quality, and vehicle condition.

ECU Tune Modification Requirements

Stage 1 hardware summary (SEO): No downpipe required. Intake + intercooler are strongly recommended for consistent power. Fresh plugs/coils help keep misfires away when you turn it up.

Optional Crackle Pops (Overrun)

Optional overrun/crackle is available by request and activates only in Dynamic/Sport. Stock exhaust = subtle. Freer-flowing setups = louder. Calibrated with RPM windows and safety logic to keep it fun without being stupid.

Boost Control & Drivability

Factory boost can feel uneven during long pulls. BDT Stage 1 refines boost control so the car delivers a linear, predictable surge with improved response and stability — especially when you roll into it mid-gear.

Software Install Requirements

WINDOWS LAPTOP REQUIRED (NO APPLE)

FAQ

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 EPA or CARB, and is therefore not legal for sale or use in California or any CARB-adopting state.

Assumption of Risk and Waiver of Liability

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 and affiliates arising from unlawful use.
3. Release Boost Dynamic Tuning, LLC from any 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 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 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: Motorsport/racing products are not designed to meet emissions standards. Not CARB-compliant. Not legal for sale or use in California or other restricted states.