2017–2024 Audi S4 / S5 3.0T Stage 2 ECU + TCU Package

Dyno Proven Gains: 345 HP → 480 HP / 365 lb-ft → 580 lb-ft

Boost Dynamic Tuning’s Stage 2 ECU + TCU Performance Package for the 2018–2024 Audi S4 / S5 3.0T combines our custom ECU calibration with an optimized TCU tune. The result is a car that doesn’t just make big numbers — it uses them with sharper shifts, deeper pulls, and a whole new driving feel.

Our dyno baseline shows ~345 HP and ~365 lb-ft on the stock setup. With the Stage 2 ECU + TCU package applied, output climbs to ~480 HP and ~580 lb-ft at the wheels. This isn’t just a tune — it’s a transformation.

Why Choose Boost Dynamic Tuning?

• U.S.-based tuner specializing in S4/S5 3.0T ECU + TCU calibrations
• All files developed **in-house** — no generic maps, no resellers
• Verified by dyno data and real-world logs
• Integrated ECU + TCU package for seamless behavior
• Talk directly with the calibrator — skip the sales guy
• 100% remote installation with live support across the USA

Stage 2 vs Stage 1 — What’s the difference?

Stage 1 is perfect for mostly stock cars on pump fuel — strong gains and daily-friendly behavior.

Stage 2 is for owners who want more: stronger pulls, more aggressive tuning, supporting modifications (down-pipe, intake, intercooler, etc.). This package unlocks the full potential of the S4/S5’s 3.0T engine and ducats the transmission too.

ECU Calibration Benefits

• Dyno Proven Power: 345 HP → 480 HP / 365 → 580 lb-ft
• Sharper Throttle Response: Instant and smooth, without the factory lag
• Optimized Boost & Fueling: Calibrated for safe, repeatable performance
• Optional Crackle/Overrun: Adjustable levels of sound & drama
• Start/Stop Default Off: Cleaner drive in daily use

TCU Calibration Benefits

• Raised Torque Limits: Lets the transmission make full use of the engine’s power
• Faster, Cleaner Shifts: Sport/D modes feel much sharper
• Better Launch Performance: Improved calibration for stronger launches
• Better Daily Behavior: Still refined when you’re not full‐throttle

Power Gains Summary

*Numbers are approximate at the wheels. Actual results vary with fuel, mods, and conditions.

Remote Tuning, Made Simple

All you need is:

• A Windows laptop
• A stable internet connection
• Our supplied tuning interface (cable included)

We connect via TeamViewer, walk you through reading your stock ECU and TCU, then flash the new calibrations live. You’re on with the actual tuner, not just a guide — direct support from system build to finish.

Transform your 2018–2024 Audi S4 / S5 3.0T with our Stage 2 ECU + TCU package. Experience precision-tuned power with seamless integration.

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 catalytic converters, oxygen sensors, EGR, 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 EPA or CARB, and therefore is not legal for sale or use in California or any state that follows CARB standards.

Assumption of Risk & Waiver of Liability

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

1. Assume all risk and responsibility for applicable laws and regulations.
2. Waive all claims, liabilities and legal actions against Boost Dynamic Tuning, LLC, its affiliates, employees or directors.
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 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: this product is not designed to meet any applicable emissions standards, is not CARB compliant, and is not for sale or use in jurisdictions where such laws apply. Boost Dynamic Tuning, LLC makes no representations or warranties regarding emissions compliance. It is your responsibility to inform yourself of any applicable laws.