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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

Home of the
Quickest BMW diesel in the UK 🇬🇧
Quickest BMW F01 730D in the world 🌍

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. We have Representatives all over the globe, From Europe, USA and Australia. Contact us now and see what we can do for you. DEMON Development

28/08/2026

"BMW E92 335D"

Customer came to us to tune there 335D after spending a pretty penny on it, and he came to the right place.

After 5 revisions got it performing well and with a slight haze in terms of smoke so pretty clean.

✅ R90 Pump
✅ M50D Rail sensors
✅ Downpipe
✅ Falcon Stage 3 Turbos @ 3BAR
✅ 7.5" Uprated intercooler
✅ Mafless Induction kit
✅ EGR & Flap solution

Should be 440 to 450bhp and 850+nm according to calculations from logs

18/08/2026

"BMW 330D E92"

Customer came to us to tune there BMW 330D, Tuning went very smoothly with only 2 revisions made and still reasonably clean power, seeing as the previous tune was smoky and didn't feel all that powerful.

✅ Uprated intercooler
✅ 3.5" Downpipe
✅ 35D Rocker cover
✅ Induction kit
✅ EGR & Flap solution

Should be around 320 to 330bhp and 700+nm according to logs

15/08/2026

"BMW E92 335D"

Customer came to us to their 335D

Tuning went well with only 3 revisions made tuned to the customers specifications, clean reliable power.

✅ 3inch downpipe
✅ Uprated intercooler
✅ Induction kit
✅ EGR & Flap solution

Should be around 370 to 380bhp and 700+nm according to logs

01/08/2026

"BMW E92 335D"

Customer came to us to fit a R90 fuel pump and m50d rail sensors.

Tuning went very well only 3 revisions made to get it performing well.

✅ DPF EGR & Flap solution
✅ Uprated intercooler
✅ R90 pump (Fitted by us)
✅ XHP STG3 TCU tune
✅ M50d rail sensors (supplied and fitted by us)

Should be around 400 to 410bhp and 800+nm customer opted for the more safer approach so not pushed this one as much as usual.

20/07/2026

"BMW E90 330D"

Customer came to us to tune there BMW 330D.

Tuning went smoothly only took around 3 revisions to get it performing well.

✅ R90 pump
✅ Uprated intercooler
✅ 2265 hybrid turbo
✅ M50D rail sensor
✅ 3inch downpipe
✅ EGR & Flap solution

Should be around 340 to 350bhp clean and 700+nm according to logs. Customer will be back to take full advantage of the fuel system in the future.

14/07/2026

"BMW E92 335D"

Customer came to us to tune there BMW 335D.

Surprisingly tuning went very smoothly seeing as the hybrids that are fitted where from a company that I have not personally heard of, so we had no idea what they are capable of, so we had to keep it reasonably safe😅.

✅ Uprated intercooler
✅ Induction kit
✅ R90 fuel pump
✅ Hybrid turbos @ 3BAR
✅ M50D rail sensors
✅ DPF EGR and flap solution

Should be around 430 to 440bhp and 850+nm according to logs

04/07/2026

Another new time for the quickest diesel e9x in the UK.

After fitting a Wagner evo 3 intercooler, which made it run 20° cooler then the previous evo 2, Obviously made a good difference in terms of power right of the bat as there was no map tweaks whatsoever between this and the 6.72 we previously ran.

Just a recap this is only a Ts3 turbo car still on the log manifold, these times are unheard of and alot of tuners claim impossible unless using nitrous or fully stripped out cars, But again I prove it's entirely possible.

No nitrous
No water m**h
Not stripped out

We will try get a 6.4 in the coming weeks, then after we reach that goal we will actually strip it and see what we get.

So stay tuned

16/06/2026

"BMW E60 530D"

Customer came to us to tune there 530D all the way from Essex, after fitting a hybrid and supporting modifications.

Tuning went well, but same situation to the other one we recently did, being the intake setup is very restrictive and proves difficult trying to run more then 2.55bar of boost, so that's what we had to leave it at until customer fits a intake.

✅ 3inch downpipe
✅ EGR & flap solution
✅ Uprated intercooler
✅ JW Automotive GTD3073BB @ 2.55BAR

Should be 360 to 370bhp and 750nm+ according to logs

Customer will be back ones fitted a intake to turn it up abit more

15/06/2026

"BMW 335D E92"

Customer came to us to tune yet another 335D, getting bored of these now 😂 jokes aside tuning went very well.

This had your typical bolt on mods nothing too drastic

✅ 3inch downpipe
✅ 4" induction kit
✅ EGR & Flap delete
✅ Uprated intercooler
✅ XHP STG3 TCU tune

Should be around 370 to 380bhp & 800+nm according to logs

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

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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