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Audi RS7 Performance C8 ECU Remapping

Audi RS7 Performance C84.0 TFSI V8 MHEV · 2023–2025

Stage 1 £995

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4.9/5500+ Google ReviewsSee Google Reviews

The Audi RS7 Performance C8 (2023 to 2025) leaves the factory with 630 PS and 850 Nm from its 4.0 petrol engine. Our Stage 1 estimate takes it to 740 PS and 1000 Nm, roughly 17% more power and 18% more torque.

Stage 1 price

£995

Stage 1 ECU remap

Estimated gain

+110 PS · +150 Nm

Power

Stock
630 PS
Stage 1
740 PS

Torque

Stock
850 Nm
Stage 1
1000 Nm

Figures are STX Tuning estimates for a healthy standard car, not a dyno result for your vehicle. Power is shown in PS. These are existing vehicle library estimates, not independently measured results.

Where would you like it done?
01753 439130
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What we do

More than just ECU remapping.

From Stage 1 and Stage 2 ECU remapping to gearbox tuning and supporting performance upgrades, STX Tuning offers specialist vehicle software and tuning services for compatible petrol and diesel cars and vans.

Explore the available options for your exact vehicle at our Slough workshop, with suitable mobile ECU remapping appointments available across selected surrounding areas.

Not sure which tuning service you need?

Tell us what you drive and what you'd like to achieve. We'll check your vehicle and help you explore the available options.

4.9/5 | 500+ Google Reviews
Get my tuning quoteCall STX Tuning: 01753 439130

Get Your RS7 Performance C8 Quote

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  • 4.9/5 Google rating · 535 reviews
  • Slough workshop
  • Vehicle-specific quotes

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Google Customer Reviews

What Audi Owners Say

See what customers say about their experience with STX Tuning.

Google Reviews

4.9

535 Google Reviews

  • Mark Baxendale

    Jun 2024

    Had some work done by Sam and his team to my Skoda Superb. Flawless execution, better MPG and power delivery and no more engine lights. Communication was great - would definitely recommend and would use again without hesitation.

    Posted on Google · view on our Google profile

  • Wayne Jackson

    Jul 2025

    Had my 2014 Golf GTI remapped by STX Tuning and I couldn’t be happier. The power gains are instantly noticeable—sharper throttle, stronger pull, and overall much more fun to drive. STX were professional and explained everything clearly. No issues since, and fuel economy is still the same. Highly recommend them if you’re looking to get more out of your car!

    Posted on Google · view on our Google profile

  • Daniel Sullivan

    Jan 2025

    Highly recommended service. The team at STX are very accommodating and professional. Had a remap on my Audi which was turned around in a day. Running perfectly. I will definitely be back for additional work in the near future.

    Posted on Google · view on our Google profile

  • Jonathan Liska

    Oct 2026

    Really fast service, I explained what I needed to solve my problem with the car and they got the parts in, did the work and all was done smoothly and efficiently. Nice workshop and friendly, polite staff.

    Posted on Google · view on our Google profile

  • Chris Green

    Aug 2026

    Contacted these guys and they came out within 2 days fixed the car and now all is perfect again really happy with the remap done on my car too very polite, efficient service and would highly recommended

    Posted on Google · view on our Google profile
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