2018–2023 Audi S4 / S5 3.0T Stage 1 ECU + TCU Package

Dyno Proven Gains: 345 HP → 446 HP / 365 TQ → 570 TQ

Boost Dynamic Tuning’s Stage 1 ECU + TCU Performance Package for the 2018–2023 Audi S4 / S5 3.0T combines our in-house ECU calibration with an optimized AL552 8-speed automatic TCU tune. The result is a harder-hitting S4/S5 that not only makes more power, but actually uses it — with smarter shift logic, faster shifts, and better overall drivability.

Our dyno testing shows a stock baseline of 345 HP and 365 lb-ft at the wheels. With our Stage 1 ECU calibration, output increases to 446 HP and 570 lb-ft, a gain of +101 HP and +205 lb-ft at the wheels. Paired with the TCU calibration, you get stronger mid-range punch, crisper upshifts, better launch behavior, and a more connected driving feel in every mode.

Why Choose Boost Dynamic Tuning for Your S4 / S5?

• U.S.-based tuner focused on advanced ECU and AL552 TCU calibrations for the B9/B9.5 3.0T S4/S5
• All ECU and TCU files developed in-house — no generic maps, no resellers
• Backed by real dyno data and real-world logging, not marketing hype
• Integrated ECU + TCU package for cohesive behavior and torque management
• Direct access to your tuner — you talk to the calibrator, not a sales script
• 100% remote installation with live support anywhere in the USA

Stage 1 vs. Stage 2 – Which Is Right for You?

Stage 1 ECU + TCU Package is ideal for a stock or lightly modified 2018–2023 S4/S5 3.0T. It maximizes safe power on factory hardware and refines the transmission behavior for quicker, smarter shifts without requiring exhaust or intake changes.

Stage 2 is for S4/S5 owners running supporting modifications (high-flow downpipes, upgraded intake, improved cooling, etc.) and looking for more aggressive boost, timing, and exhaust behavior. If you’re unsure what fits your build and driving style, we’ll help you plan based on how you actually use the car — daily, canyon runs, roll racing, or track.

ECU Calibration Benefits – 3.0T (B9 S4/S5)

• Dyno Proven Power: 345 HP → 446 HP / 365 TQ → 570 TQ
• Sharper Throttle Response: More immediate pedal feel without “on/off” jerkiness
• Refined Torque Management: Improved torque delivery and cooperation with the AL552 TCU
• Optimized Boost, Timing, and Fueling: Calibrated for safe, repeatable performance on pump fuel
• Optional Exhaust Crackle/Overrun: Low, Medium, or Intense levels available on request
• Exhaust Valve Strategy: Valves (where equipped) stay open in Dynamic/Sport modes for maximum sound
• Start/Stop Default Off: Engine stop-start begins in the off position for a cleaner drive
• Safe, Data-Driven Mapping: Built from logs, dyno sessions, and real-world testing

TCU Calibration Benefits – AL552 8-Speed Automatic

• Raised Torque Limits: Allows the transmission to fully utilize added ECU torque without premature intervention
• Improved Shift Speed: Faster, more decisive upshifts and downshifts in Dynamic/Sport modes
• Optimized Shift Points: Better gear selection in D/S modes to keep the 3.0T in its powerband
• Refined Part-Throttle Behavior: Smoother, less “busy” shifting around town and on the highway
• Launch Behavior Optimization: Launch control activated and calibrated; settings can be adjusted by request
• Reduced Kickdown in Manual Mode: Manual mode behaves more like a true manual — less unwanted auto-downshift
• Line/Clutch Pressure Adjustments: Improved clutch clamping and shift feel under load
• Better Cooperation with ECU Tune: TCU and ECU are calibrated together for consistent, predictable performance
• Improved Dynamic/Sport Experience: More aggressive logic when you want it, without ruining daily drivability

Power Gains Summary – 2018–2023 Audi S4 / S5 3.0T

*ECU gains measured at the wheels. Real-world acceleration also improves from TCU shift and torque management changes.

Remote ECU + TCU Tuning, Made Simple

Our S4/S5 package is designed around convenience and support. All you need is:

• A Windows laptop
• Stable internet connection
• Our supplied tuning interface

We connect via TeamViewer, walk you through reading your stock ECU and TCU, then flash the updated calibrations in real time. You’re on a live session with the actual tuner — the person who built your files and can answer your technical questions on the spot.

Hear It & See the Process – S4/S5 Videos

Real B9 S4/S5 footage — how it sounds and how remote tuning works.

Transform your 2018–2023 Audi S4 / S5 3.0T with a complete ECU + TCU solution.
Experience what a properly integrated Boost Dynamic Tuning Stage 1 package feels like.

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.