BDT Stage 2 ECU Tune – Audi A4 B7 2.0T (2005–2008)

Take your Audi A4 B7 2.0T beyond the basics with Boost Dynamic Tuning’s Stage 2 ECU calibration. Building on our proven Stage 1, Stage 2 is designed for cars equipped with proper supporting hardware (downpipe/high-flow cat, intake, plugs, DV, etc.) and delivers harder mid-range punch, stronger top-end, and a more aggressive overall character — while retaining daily drivability.

Every file is developed in-house by Boost Dynamic Tuning (BDT). No off-the-shelf rebrands, no guessing. Our calibrations are based on real dyno data and street validation so you get consistent, repeatable power and smooth behavior in all conditions.

BDT Stage 2 Tune Features

• Increased Horsepower and Torque Gains over Stage 1
• Speed Limiter Removed
• Raised Torque Limiters
• Refined Fueling Strategy Based on Load & Throttle Position
• Optional Crackle/Overrun ( Low, Medium, Intense/Flame)
• Boost Control Recalibrated for Smooth, Linear Onset
• Reduced Turbocharger Lag
• Increased LPFP & HPFP Pressure Targets
• Variable Valve Timing (VVT) Optimization

Crackle Pops (Overrun)

Stage 2 turns up the drama. Our crackle/overrun feature adds sharp, controlled pops and crackles on deceleration or free-revving. It’s subtle on a stock exhaust but really comes alive with a high-flow cat or cat-back system. Tuned to be fun and aggressive — without being out of control.

Boost Control Refinement

From the factory, the B7 A4’s boost curve is rough and inconsistent, especially during long pulls. With BDT’s Stage 2 ECU calibration, the boost strategy is completely refined — delivering a smoother, more predictable curve, quicker spool, and stronger mid-range and top-end power. Every gear, every pull, the car feels eager and responsive.

Power Gains

*Dyno numbers may vary based on fuel quality, elevation, hardware condition, and dyno type.

Required & Recommended Hardware – Stage 2

ECU Removal Instructions

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.