Remote ECU tune · 4.0L twin-turbo V8 (EA824)
A custom Stage 1, 2 or 3 calibration for your Audi S6 / S7 / S8 / A8 4.0 TFSI (C7 / D4), built by hand by a real tuner from your own stock file and datalog, and back with you within three hours of the file arriving. We tune these cars remotely, worldwide: you read and flash with your own HP Tuners interface, and you pay only once the tune is delivered.
Stock vs tuned
From the factory the Audi S6 / S7 / S8 / A8 4.0 TFSI (C7 / D4) makes 414 hp and 406 lb-ft (550 Nm). A Stage 1 tune typically adds 100–140 hp and 74–177 lb-ft, for around 514–554 hp in total. With bolt-ons and a Stage 2 calibration that grows to +140–175 hp, and a Stage 3 build — RS6/RS7 turbocharger swap + RS-turbo software — typically lands at 564–634 hp.
| Stage | Added power | Added torque | Total power | Total torque |
|---|---|---|---|---|
| Stock | — | — | 414 hp | 406 lb-ft (550 Nm) |
| Stage 1 | +100–140 hp | +74–177 lb-ft (+100–240 Nm) | 514–554 hp | 479–583 lb-ft (650–790 Nm) |
| Stage 2 | +140–175 hp | +177–236 lb-ft (+240–320 Nm) | 554–589 hp | 583–642 lb-ft (790–870 Nm) |
| Stage 3 | +150–220 hp | +218–240 lb-ft (+295–325 Nm) | 564–634 hp | 623–645 lb-ft (845–875 Nm) |
Typical gains from published dyno results; your car will vary with fuel, mods and conditions.
Tuner's notes
Stock is the 420 PS / 550 Nm C7 S6/S7 and D4 A8 4.0T; the C7.5 S6/S7 is 450 PS and the D4 S8 is 520 PS / 650 Nm, so those start higher and gain less in proportion.
Supported versions
HP Tuners lists 4 Audi S6 / S7 / S8 / A8 4.0 TFSI (C7 / D4) entries covering 2012–2018, with 4.0-litre engines. Interface: MPVI2 or newer.
| Years | Model / engine as HP Tuners lists it | Controller | Credits | Interface |
|---|---|---|---|---|
| 2012–2018 | S6 4.0L TFSI (C7) (MED17.1.1) | Engine | 6 | MPVI2/2+/3/4 |
| 2012–2018 | S7 4.0L TFSI (4G) (MED17.1.1) | Engine | 6 | MPVI2/2+/3/4 |
| 2012–2018 | S8 4.0L TFSI (D4) (MED17.1.1) | Engine | 6 | MPVI2/2+/3/4 |
| 2013–2018 | A8/A8L 4.0L TFSI (D4) (MED17.1.1) | Engine | 6 | MPVI2/2+/3/4 |
Support data per HP Tuners' supported-vehicle list (June 2026). Check your exact car on HP Tuners' vehicle list before you buy credits.
Stages & prices
One flat price per stage, the same for every car: $250 for Stage 1, $450 for Stage 2 and $650 for Stage 3. Ordering is free and you pay only once the finished tune is delivered. 2 free revisions are included with every order. Gearbox (TCM) shift tuning is included wherever your car's transmission controller can be accessed.
Software only. Every map in the MED17.1.1 is recalibrated for the Audi S6 / S7 / S8 / A8 4.0 TFSI (C7 / D4) as it sits today — spark, fuelling, throttle response and limiters — against the datalog you send.
For a Audi S6 / S7 / S8 / A8 4.0 TFSI (C7 / D4) with bolt-ons fitted — intake, exhaust, headers or downpipe, and an intercooler where the car has one. The airflow and fuelling are rebuilt around the hardware you actually have.
Stage 3 on the Audi S6 / S7 / S8 / A8 4.0 TFSI (C7 / D4) means RS6/RS7 turbocharger swap + RS-turbo software. The fuel, spark and boost maps are written from scratch for your exact combination.
Typical gains from published dyno results; your car will vary with fuel, mods and conditions.
Before you order
How it works
FAQ
Typically 100–140 hp and 74–177 lb-ft (100–240 Nm) over the stock 414 hp, for around 514–554 hp in total. Typical gains from published dyno results; your car will vary with fuel, mods and conditions.
An HP Tuners interface (we recommend the MPVI4), the HP Tuners credits needed to license the MED17.1.1 for writing, and your stock file plus a datalog of a drive. You read and flash the car yourself; we build the calibration.
Your custom tune is delivered within three hours of your stock file arriving. Six tuners work three shifts, so a file that lands in the middle of the night is picked up just as fast.
Stage 1 is $250, Stage 2 is $450 and Stage 3 is $650, flat. Ordering is free and you pay only once the finished tune is delivered. 2 free revisions are included with every order.
Stage 3 on the Audi S6 / S7 / S8 / A8 4.0 TFSI (C7 / D4) means RS6/RS7 turbocharger swap + RS-turbo software. The maps are written from scratch for your build, and typical results are 150–220 hp over stock. Typical gains from published dyno results; your car will vary with fuel, mods and conditions.
