Just fitted ithe 2 channel box today to a 3.0L A5 quattro and what difference an thats just on the optimal (middle setting) didn't try the other 3 setting on ether side for performance and fuel consumption because it's pissing down ou side and didn't want to get water in it. As it stands just now on optimal the power increase is well worth the money, can't wait to see what it's like at max :-D :-D :-D

After fitting a twin chanel tuning box to my Navara I initially found it developed a strange problem. Since contacting TDI Tuning and visiting them at Chelmsford they have remapped the box and the problem has gone, what's more impressive is that on my way home to Norfolk it returned a very satisfying 37.4 mpg!!! It's never reached that in the 6 years I've owned it. Well done TDI Tuning, well impressed.

Excellent service. Top quality product. Attempted to put it on myself and failed... Lady behind the desk got her hands dirty and put me to shame. 10/10 highly recommended.

Have had the tuning box fitted to my MG6 GT S 1.8 Turbo 160ps for a couple of months after assisting TDI tuning with developing the box for the MG6 Petrol Engine. Must say I am quite impressed by the improvement in performance, the car drives so much better and feels like it has been set free and now has the power it should have been given by the manufacturer. I have had a play on a most of the settings but find that the middle setting to give me better fuel economy and adequate performance boosts for my needs and am averaging 4-6mpg more than before I installed the tuning box. However if I do want to have some fun it's so simple and quick to change the setting. Michael and his team at TDI Tuning were very helpful and answered any questions that I had regarding the tuning box.

Couldn't believe how quickly and neat the guys fitted my twin channel box to my 430d m-sport! Made such a difference, drives like a different car! Thanks guys give me a tag if you get round to putting the picture up! (White 430 with carbon parts)

I bought a dual channel tuning box for my focus estate 1.8 tdci 2006, and so far everything is great. With the dip switch set in the default position I'm getting around 50 miles more from a tank of fuel, and the car is revving around 100 rpm lower for the same speed than before. So I don't have to floor it as much to pull away at junctions. So it's made it quieter and much more refined to drive, turbo lag is reduced considerably and the power is more low down in the rev range where you need it for driving around town with a smoother less aggressive acceleration when you do floor it. I did try pushing the power up by around 10 bhp by setting the dip switch higher, but it did increase engine noise, fuel consumption (by a lot!) and made the cruising speeds around town sit more comfortably into lower gears which kept the revs higher. So overall I'm very happy with the optimum setting and it will pay itself off pretty quickly if I can get 50 miles more per tank consistently. Great!

Fitted the unit to the Transit Custom M Sport. The factory 155hp was a real let down compared to the way it looks. I fitted the unit which was extremely easy and wasn't that impressed at first. But then I found the little jumper inside the unit to select a different map, moved it all the way up the red section and now it feels like a new van. (Still not a patch on the V6 Vito though. Probably gonna put one on the Navara next.

Fitted the unit to the Transit Custom M Sport. The factory 155hp was a real let down compared to the way it looks. I fitted the unit which was extremely easy and wasn't that impressed at first. But then I found the little jumper inside the unit to select a different map, moved it all the way up the red section and now it feels like a new van. (Still not a patch on the V6 Vito though. Probably gonna put one on the Navara next.

amazing

First class service, aftercare was second to none. Will certainly recommend to friends and family.

Bought the TDI Tuning box for my MG 6 1.8 Turbo petrol. Easy to fit and has transformed the car. The power delivery is a lot smoother and low rev performance is increased.

I choose the twin channel set up for my 2016 BMW 220d M Sport, taking my BHP to around 250bhp from 187bhp and 488 torques from 400. My car's performance has hit heights I'd never expected. I'm currently on the "optimum setting" and the car is savage!...I still have a further 3 extra settings to explore for further performance! Can't wait to see the results of that, if "optimal" is anything to go by. I had initial set up issues (my fault) but the guys at TDI Tuning were instantly on hand to help me out. So far, so great!

Bought a chip kit for my Audi at 2.5tdi, took 5mins to fit. Power increase is well noticeable! Well chuffed. Would recommend that anyone looking for plug n play chip that they check out TDI TUNING. Well worth it

What a fantastic product! I purchased a VW T6 Van in April this year after a month I realised that the MPG that VW quoted was far far from realistic. After seeing an advert for this product I thought I would give it ago. For a bolt on product that is only £360 I am getting around 5MPG more on its most powerful setting and saving around £8 a week in fuel! I also had it fitted free of charge at the Chelmsford HQ and the service I received was far beyond what I was expecting. They really could not do enough for you!

Got one of the twin channel tuning boxes fitted to my A1 on saturday although the wrong loom was originally sent out i made the journey to get the right one and have it fitted for free at tdi tuning, couldnt recommend them more the box is great and i got to run it in as they instruct you to on my journey home, now running it on the highest setting and its made my car a completely different car, and the best thing is i will be sending it back to be reprogrammed when i get my next car, top class company

I bought a tuning box for my c250 and it's working a treat. It was very easy to fit and the difference is fenomninal power is increased massively and it's really smooth and doesn't kick out any smoke. Brilliant product highly recommend

I purchased a crtd2 for my Kia rio 1.1. First impressions weren't great, didn't notice much difference. I did what most stupid blokes would do and whacked it on to the most powerful setting and certainly noticed a difference then! Unfortunately fuel economy took a nose dive in that setting ad well! Back on the 'optimal' middle setting again and after few hundred miles fuel economy has improved by around 7mpg and it feels a bit perkier than before. I bought this to save fuel though, not to go fast (it's a 1.1 after all) and I'm getting around 80mpg on my daily commute. Good service, quick response from the online advisors.