Big Fish Garage

Big Fish Garage With a team of in-house calibrators, we'll provide your vehicle with a high quality custom tune.

We have been tuning cars for over 10 years now, initially starting off with the aftermarket ECU's namely Motec (M48R Pro and the M800 Series), Apexi Power FC's and the GEMS ECU's. Due to many cars were off-road rally specificaiton or fast track day items these ECU's were perfect for finely tuning the cars with additional features such as anti-lag and launch control. These days whilst we can still

offer these services, we mainly concentrate on the OEM specification ECUs fitted in standard road cars from the likes of Bosch/Siemens/Delphi and Marelli (To name a small few!). Utilising the very latest OBD and BDM equipment from Dimsport, Alientech, Byteshooter,AMT Cartech and others we can safely and reliably custom remap your car to it's ultimate potential. We can cater for any modifications and each car is custom mapped to ensure optimum running at all times. We don't believe in pub-talk figures and concentrate mapping the cars for usable power and for optimum performance. Call us for some friendly advice, even if you are looking to tune your car in the future we can certainly advise on a path forward for yourself.

Big news for BMW owners! If your vehicle was built after June 2020 and you've contacted us for tuning, previously we wou...
14/08/2026

Big news for BMW owners!
If your vehicle was built after June 2020 and you've contacted us for tuning, previously we would have told you that your ECU is locked and would need sending away to be unlocked before we could tune it, at an additional cost.
This is no longer the case!

We can now tune the majority of 2020 onwards BMWs in house like any other vehicle!

Get in touch with your vehicle reg via the below details for an updated quote, and we'll advise on cost and typical gains you should see.

📞 Tel / Whatsapp: 01642 039111
📲 Web: www.bigfishgarage.co.uk
✉ Email: [email protected]

12/08/2026

Just a quick note, we have some staff holidays over the next 2 weeks. If you have called this week please be assured we will get back to you as soon as possible but have received your messages!

Our new website is now live! We'll be adding more content and pages over the coming weeks and months, so keep an eye for...
22/07/2026

Our new website is now live!

We'll be adding more content and pages over the coming weeks and months, so keep an eye for updates!

Our garage is fully equipped to provide the highest quality diagnostics, remapping, servicing and repair. Get in touch today to see how we can help!

A farewell… and an exciting hello to the next chapter of Big Fish Garage! It's a bit of a post but one I really want to ...
22/06/2026

A farewell… and an exciting hello to the next chapter of Big Fish Garage! It's a bit of a post but one I really want to post.

After many brilliant years building Big Fish Garage, the time has come for me to step away from the day-to-day running of the business and focus more of my energy on other ventures. Many close friends will know why this is coming.

I will remain a shareholder and will always care deeply about what we have built, but the business is now in exactly the right hands.
Guy and Chris have earned this opportunity. They have put in the hard work, shown huge passion for the business, and developed their own expertise through the freedom they have had in the workshop, on the dyno and with the increasingly complex work that comes through the doors.

They are no longer simply part of the team — they are the masters of the business. So much so, many customers will be thinking "Who's this John fella?!"

Big Fish Garage has always been about doing things properly: honest advice, serious diagnostic capability, quality workmanship and solving the jobs others cannot. Guy and Chris understand that better than anyone, and I am incredibly proud to see them take the business forward.

On a personal note, I took Guy and Chris on to train, develop and become part of the business — but somewhere along the way they became much more than that. They became true lifelong friends. There has been so emotional times over the last few years and we have supported each other through various stages of the journey in ways we genuinely could never of imagined would happen. Part of this was Guy, unknown to many had cancer and the way Chris stepped upto the mark to support and run this business was quite simply, legendary. Thankfully Guy is fully clear, and made an exceptional recovery which we all were massively grateful for.

We have worked hard together, learnt a lot together and had plenty of good times along the way. I know there will be many more of those to come — both in and out of the workshop.

They have been the mechanic team behind my ongoing midlife racing crisis, which I fully intend to carry on with properly! So while I may be stepping back from the day-to-day side of BFG, so whilst I may not be at the workshop or dyno much anymore, don't be surprised if we are at the tracks!

I also want to say a huge thank you to the many friends I have made through this business over the years — customers, suppliers, fellow businesses and everyone who has supported us along the way. You all know who you are, and there are simply too many of you to list. You have helped make BFG what it is. Your support, loyalty, encouragement and friendship have meant more than I can put into words. Much love to Acid and the MSL team for all our past and hopefully future developments together.

And a very special thank you to Pip. She has been a huge part of the change and development of Big Fish Garage, especially through the growth of the business and everything that has happened behind the scenes. We simply could not have done it without her. Her hard work, belief, support and commitment have helped shape BFG into what it is today.

For customers, suppliers and friends of Big Fish Garage, it is very much business as usual (if not better than ever) — with an exciting future ahead. The lads have big plans, the same standards remain, and I have every confidence they will take the business to the next level and beyond with the focus and dedication that you expect and need.

Please join me in wishing Guy and Chris every success as they lead this next chapter, these guys are masters at their craft and just keep getting better. Massively proud of you both. Thank you to everyone who has been part of the journey.

Onwards and upwards.

Signing off as Chief,
John

P.S. Interview with Chris here to give you an idea of the next steps:

http://bit.ly/4v1s7AA

01/06/2026

We have staff on annual leave this week, so responses may take a little longer than usual. We will deal with all enquiries as soon as possible and appreciate your patience while we get back to you.

A huge thank you to Mazdadudes - MX5 Servicing Repair Spares Car Sales Welding and Restoration for putting on such a bri...
18/05/2026

A huge thank you to Mazdadudes - MX5 Servicing Repair Spares Car Sales Welding and Restoration for putting on such a brilliantly organised event yesterday!

It was a fantastic opportunity to connect with a great community of enthusiasts — even if we have to admit we didn't quite fit the Mazda owner criteria! 😄

We're already looking forward to the next one in September. See you there!

27/03/2026

Just a quick note to say we're flat out at the moment. We appreciate your patience while we catch up. Anybody who has sent a message will be responded to ASAP during business hours. Thanks 🙏🏼

Big news for Ford Transit, Ranger, Mondeo and Kuga owners with the 2021 onwards 2.0 EcoBlue engines.The long-awaited SID...
12/03/2026

Big news for Ford Transit, Ranger, Mondeo and Kuga owners with the 2021 onwards 2.0 EcoBlue engines.

The long-awaited SID212 / SID212 EVO unlock is now available, meaning we can now tune these ECUs directly in-house. There is no longer any need to send the ECU away or deal with long turnaround times.

Whether you are looking to increase performance or require an emissions solution, we are now accepting bookings for these vehicles.

Depending on the model, gains of up to 85hp and 100Nm are achievable, making this a worthwhile upgrade for many owners.

As always, all tuning is custom written in-house on the day specifically for your vehicle. We also provide before and after dyno printouts, along with full diagnostics and datalogging throughout the process.

Get in touch now via phone or drop a message via our socials.

Well that's us for 2025, another year done and it's been a busy one! Thank you to all our customers both old and new, we...
23/12/2025

Well that's us for 2025, another year done and it's been a busy one! Thank you to all our customers both old and new, we hugely appreciate your continued trust in bringing your vehicles in whether it be for tuning, diagnostics, repair or upgrades.

It's time for a well earned break then we'll be back at it in the new year with our usual high standard of tuning along with more Hyundai i20n development, standalone ECU tuning, and more offerings from both our Dyno cell and Workshop.

We appreciate we've been quiet on social media this year but we've just been so flat out it's hard to find the time with such a small team, but we'll aim to bring more content in the coming year.

Hope you all have a Merry Christmas, and a Happy New Year!

https://www.bigfishgarage.co.uk/mapevWe are pleased to announce that we are now authorised dealers for MapEV - A tuning ...
16/12/2025

https://www.bigfishgarage.co.uk/mapev

We are pleased to announce that we are now authorised dealers for MapEV - A tuning option for EVs from Porsche, Audi, VW and Skoda!

Some huge gains are possible on these vehicles depending on the model you have, find out more from our website and MapEVs website below, or get in touch to discuss.

Address

Behind Navigation House, 18 Ellerbeck Way
Stokesley
TS95JZ

Opening Hours

Monday 9am - 4pm
Tuesday 9am - 4pm
Wednesday 9am - 4pm
Thursday 9am - 4pm
Friday 9am - 4pm

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