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Monday 12am - 5pm Tuesday 12am - 5pm Wednesday 12am - 5pm Thursday 12am - 5pm Friday 12am - 5pm Saturday 9am - 4pm

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DEMON Development

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DEMON Development

Welcome to DEMON Development! Your Only BMW & VAG Tuning Specialist We have Representatives all over the globe, From Europe, USA and Australia. DEMON Development

We are the leading brand in VAG & BMW motor vehicle Development in the UK

We Specialise in all applications of motor sport, If its Drag, Drift, Track, Off road racing or just normal road use, we have you covered. Contact us now and see what we can do for you.

05/06/2026

"BMW E92 335D"

Customer came to us to fit some go faster parts, some preventative maintenance including vac lines and EGR/cooler delete and tuning.

Tuning went very well with only 3 revisions made.

✅ Uprated intercooler
✅ EGR & Flap delete (supplied & fitted by us)
✅ R90 pump (Supplied & fitting by us)
✅ XHP STG3 TCU tune
✅ 4inch intake (Supplied & fitted by us)
✅ M50D Rail sensors (supplied & fitted by us)

Should be around 400 to 410bhp & 850+nm according to logs

31/05/2026

"BMW 330D E90"

Customer came to us to tune there 330D E90 after fitting and downpipe and egr delete kit.

After a few revisions got it performing well

✅ Downpipe
✅ EGR & Flap delete

Customer was advised to fit a Uprated intercooler to keep them IATs down.

Should be 300 to 310bhp and 650+nm

23/05/2026

"BMW E92 335D"

Customer came to us to tune there 335D E92 and fit some parts

Tuning went very smoothly

✅ 3inch downpipe (supplied & fitted)
✅ Uprated intercooler
✅ EGR & Flap delete
✅ 4inch intake to cone filter
✅ XHP STG3 TCU tune

Should be around 370 to 380bhp and 750+nm according to logs

19/05/2026

"BMW F01 730D"

Here we have yet another achievement a BMW F01 730D which is one of our own cars that we have been working on, and we have to say we are very impressed with the results.

We had a set goal in mind, not only do we have the quickest E9x in the uk, but we now have a world record of the quickest 730D, not just UK under our belt.

We managed a 100 to 200 of 7.82, but a corrected time of 7.63 with a full weight 7 series diesel only, now these cars are known to weigh over 2 ton.

✅ 3inch downpipe
✅ EGR & Flap delete
✅ Uprated intercooler
✅ M50D injectors
✅ M50D rail sensors
✅ Dtune shaft
✅ Turbo Systems Stage 4 @ 3.5bar

So putting the time and weight into perspective should be around 620 to 630bhp and 1100nm

So again setting records at DEMON Developments

28/04/2026

"BMW E92 330D"

Customer came back to us for a retune after fitting a Falcon STG2 turbo.

Tuning went smoothly with only 3 revisions made.

✅ Falcon STG2/GTB2362VK @ 2.55Bar
✅ EGR, Flap and DPF solution
✅ Uprated intercooler
✅ Xhp STG3 TCU tune

Should be around 350 to 360bhp & 750+nm according to logs

We could push it abit more but with the stock intake it starts getting quite restrictive over 2.55bar, Customer will be fitting a custom intake then we shall turn it up slightly.

26/04/2026

"BMW E92 335D"

Customer came to us to Retune they're 335D

Very clean example, Tuning process went very well with only 3 revisions including the base map.

✅ Uprated intercooler
✅ 3inch downpipe
✅ EGR & Flap solutions
✅ Xhp TCU tune

Very clean tune with hardly any smoke, Should be 370 to 380bhp & 700nm+ according to logs

01/04/2026

Big achievement here at DEMON Development.

This N57 330d we recently tuned is officially the quickest genuine diesel BMW on (Record) in the UK, at a 100 to 200 in 6.77sec, full weight only diesel.

Not only is it the quickest but it achieved this goal with only Stage 3 TS turbo, which is a rather impressive testament to Turbo systems

Congrats to the owner also for making this possible with a very well maintained and put together E90

28/02/2026

"BMW 335D E91"

Customer came to us to tune their 335d, seeing as we do tune allot of these cars.

Nothing too special but a nice example non the less.

✅ EGR, DPF and flap delete
✅ Uprated intercooler
✅ Induction kit

Should be around 360 to 370bhp & 700nm+ smoke free

Customer will be back ones fitted R90 and m50d rail sensors then will be another stock turbo 335d in the 400+ club

24/02/2026

"BMW 335D E91"

Customer came to us to tune there 335d as obviously we are the go to guys to tune these and rightly so, as we have extensively worked on the 35d platform for quite sometime now and get results.

So everything went smoothy did a few revisions and got it performing well, minor 1 hiccup of the top boost hose popping off 😅

✅ R90 fuel pump
✅ M50D rail sensor & DRV30
✅ EGR & Flap delete
✅ 3inch downpipe
✅ Uprated intercooler

Should be 410 to 420bhp & 800nm+ according to logs

02/02/2026

"BMW E90 N57"

Customer came to us again suffering from the Apache mod, was tuned by 2 different tuners! and just couldn't get it to stop surging.

We started from scratch and after 3 revisions got the car running perfectly and most importantly no surge in all gears!

We are starting to see alot of these cars fitted with the Stage 3 TS turbos, after they have been to reputable tuners coming out sounding like helicopters, and told its normal well i can assure you it's definitely not normal, sometimes it's a hardware issue, but mostly it's tuner error.

✅Stage 3 Turbo systems turbo @ 2.8bar
✅3inch downpipe
✅Tubular exhaust manifold
✅EGR & Flap delete
✅Uprated intercooler

Should be around 400 to 410bhp and 800+nm according to logs

Address

Business Centre, Halifax Road, Denholme
Bradford
BD134EN

Opening Hours

Monday	12am - 5pm
Tuesday	12am - 5pm
Wednesday	12am - 5pm
Thursday	12am - 5pm
Friday	12am - 5pm
Saturday	9am - 4pm

Website

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