What are the opening hours?

Monday 7am - 6pm Tuesday 7am - 6pm Wednesday 7am - 6pm Thursday 7am - 6pm Friday 7am - 6pm Saturday 7am - 6pm Sunday 7am - 6pm

MAC Tuning

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Specialist ECU tuning and remapping company based in Hertfordshire. Contact us for more info!

13/10/2026

BMW X5M | Stage 1 ECU & TCU Tuning

This 4.4L V8 Bi-Turbo X5M visited us for a complete engine and gearbox software upgrade.

Power is now sitting just under 700bhp and 900nm this is a massive improvement in performance compared to stock.

TCU Gearbox Tuning:
* Faster, sharper gear changes
* Optimised shift points
* Improved gearbox responsiveness
* Enhanced power delivery

A serious performance upgrade, transforming both power and drivability.

Drop us a message to discuss yours! 🔥
- Klarna ✅
- Clearpay ✅
For all enquiries:

📞 01707502665
💻 www.mac-tuning.co.uk
📧 [email protected]

09/10/2026

Audi RS3 in our workshop for fitment of the incredible Forge Motorsport carbon air intake kit! 💨

This is a huge upgrade over the smaller restrictive stock setup and will now improve turbo lag and of course add induction noise 👌🏼

Drop us a message to discuss yours! 🔥
- Klarna ✅
- Clearpay ✅
For all enquiries:

📞 01707502665
💻 www.mac-tuning.co.uk
📧 [email protected]

06/10/2026

BMW 420i 2022 in for our performance tuning package and ECU unlock!

Drop us a message to discuss yours! 🔥
- Klarna ✅
- Clearpay ✅
For all enquiries:

📞 01707502665
💻 www.mac-tuning.co.uk
📧 [email protected]

01/10/2026

Audi RS7 Stage 2!

CTS Turbo intakes
MTC Motorsport charge pipes
Jose Mercado cooler
Milltek 🇬🇧 downpipes

Engine & gearbox tuning completed, unlocking more power, increased torque and sharper gear changes.

Improved throttle response, stronger acceleration and smoother power delivery throughout the rev range.

Drop us a message to discuss yours! 🔥
- Klarna ✅
- Clearpay ✅
For all enquiries:

📞 01707502665
💻 www.mac-tuning.co.uk
📧 [email protected]

27/09/2026

Mercedes C43 AMG 🇩🇪

We had this incredible C43 in our workshop for our stage 1 performance tuning with a service at the same time!

It’s new owner has peace of mind knowing exactly when it’s last service was and having it inspected prior to tuning ✅

Drop us a message to discuss yours! 🔥
- Klarna ✅
- Clearpay ✅
For all enquiries:

📞 01707502665
💻 www.mac-tuning.co.uk
📧 [email protected]

24/09/2026

BMW 30d in for Stage 1 engine & gearbox tuning 🔧

A strong platform with plenty of potential from the 3.0 diesel. ECU calibration optimised to improve torque delivery, throttle response and overall drivability while retaining factory refinement.

Drop us a message to discuss yours! 🔥
- Klarna ✅
- Clearpay ✅
For all enquiries:

📞 01707502665
💻 www.mac-tuning.co.uk
📧 [email protected]

22/09/2026

Audi A7 in for our full performance tuning on both the engine and gearbox!

Our long time customer owned this one for less than 24hrs before bringing it straight to us knowing it needed the power boost 📈

These utilise the same 3.0 EA839 engines found in the S4’s, S5’s and SQ5’s meaning we know them very well! Sitting stock at 340bhp they tune up to a much better 400bhp and 600nm.

Drop us a message to discuss yours! 🔥
- Klarna ✅
- Clearpay ✅
For all enquiries:

📞 01707502665
💻 www.mac-tuning.co.uk
📧 [email protected]

21/09/2026

Porsche Macan GTS in our workshop for performance tuning on the ECU and PDK gearbox!

The owner of this 22 plate Macan was turned away by several tuning companies due to the newer locked ECU’s however we can unlock and tune these in house 👌🏼

Powered by the 2.9L twin-turbo EA839 V6 – the same core engine found in the Audi RS4 & RS5…but sprinkled with some Porsche magic…and then heavily restricted to just 370bhp leaves these feel incredible muted and flat.

With both the ECU & TCU tuned the power gains are incredible and are pushed up to 510bhp & 680nm. A completely different beast and all just from software tuning 🔥 Don’t just take our word, swipe to see the review!

Drop us a message to discuss yours! 🔥
- Klarna ✅
- Clearpay ✅
For all enquiries:

📞 01707502665
💻 www.mac-tuning.co.uk
📧 [email protected]

20/09/2026

Super clean RS3 in with us for our ECU & TCU tuning package!

This low mileage example breezed our pre tuning health checks and data logged perfectly ✅

Stage 1 engine and gearbox tuning applied and this now sits just shy of 500bhp and a huge 620nm…rocket of a car 🚀

Throttle response completely overhauled, lag now gone, flat spots gone and an entirely new power delivery compared to factory.

Drop us a message to discuss yours! 🔥
- Klarna ✅
- Clearpay ✅
For all enquiries:

📞 01707502665
💻 www.mac-tuning.co.uk
📧 [email protected]

18/09/2026

Audi Q7 50TDI now running our engine and gearbox performance tuning 📈

Sitting at a much better 350bhp and 720nm it’s a huge transformation from the slow and laggy stock output!

It now has the performance to match its presence 🔥

Drop us a message to discuss yours! 🔥
- Klarna ✅
- Clearpay ✅
For all enquiries:

📞 01707502665
💻 www.mac-tuning.co.uk
📧 [email protected]

Address

Mac Tuning, Church Farm, Stevenage
Ardeley
SG27AH

Opening Hours

Monday	7am - 6pm
Tuesday	7am - 6pm
Wednesday	7am - 6pm
Thursday	7am - 6pm
Friday	7am - 6pm
Saturday	7am - 6pm
Sunday	7am - 6pm

Website

http://www.mac-tuning.co.uk/

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