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Dyno Developed Software & Unrivalled
Technical Support.


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An ECU Remap for your exotic car
can significantly improve your driving


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ECU Remapping your Turbo Diesel has
never been so easy. With improved power
and fuel economy one simple step away.


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Tuning your truck can improve your pulling
power and fuel economy. See how Celtic
Tuning can help you and your fleet.


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Towing power is essential for any
farmer. Improve the power and
fuel economy of your tractor with
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Testimonial Jaguar Reviews

Excellent service

Check Jaguar XJ stats

Jaguar XJ 3.0d V6 271 bhp Diesel

Posted on 9th February 2023, 16:23

Great service by Jamie, turned up on time (actually slightly early) very friendly and professional, and the car feels amazing can feel the difference already just on short journeys. Thanks very much will highly recommend you.

Will Douglas

Restaurant owner , The briery bar and restaurant

Workington, Cumbria , United Kingdom

Great job on my XJ

Check Jaguar XJ stats

Jaguar XJ 3.0d V6 271 bhp Diesel

Posted on 30th July 2021, 11:25

Just wanted to write and say thanks for the great job you did on my Jaguar XJ 3.0D today. The 50BHP and 80lb/ft you rediscovered for me were noticeable on the drive home, with noticeably water and more immediate performance.But alongside that, I reset the fuel computer on the way down to assess motorway MPG over around 30 minutes and was clocking around 48MPG. On the way back, I did the same again and was now clocking over 62MPG! Even the urban cycle only is now almost 50MPG, where it was more like 35MPG before. Amazing improvement! (You can see photo proof of the benefits in MPG below.)Thanks, too, for the advice about the MAP and airflow DTCs - I’ve fitted the replacement MAP sensor I had bought and could swear I’ve found further BHP as a result, but I will look into getting the engine smoke-tested just in case.Fantastic work from both of you today and great service from start to finish.


Wigan, United Kingdom

Jaguar XF 3.0d V6 236 bhp Diesel

Posted on 6th August 2020, 16:36

I recently had my XF re-mapped by Celtic. The guy turned up on time on the day he was very polite and answered every question I had. When I drove it for the first time after the remap I was extremely pleased with the results. Yes, it is quicker and more responsive, however, there is more to it than just that. The car pulls away so much more fluidly and the delivery of power is silky smooth. I have also noticed an improved fuel economy. If you are serious about having this done call Celtic Tuning. They are very professional and experts at what they do.


Kent, United Kingdom

Spectacular upgrade

Check Jaguar XF stats

Jaguar XF 3.0d V6 271 bhp Diesel

Posted on 21st March 2019, 15:38

Not an actual picture of the tuned car

I rate Celtic Tuning very highly. This is a no-nonsense professional company. No, if's or but's they delivered excellent customer service and a brilliant remap.
My car already had great torque and plenty of grunt but Celtic Tuning made an awesome car better. The cost of the remap was very competitive. I will use this company to do all of my performance upgrades in the future.
I am very happy!

Barry Thompson

Local Government Officer

United Kingdom

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