What is the difference between Stage 1, Stage 2 and Stage 3 remapping?

Stage 1 works within the standard hardware of the vehicle, optimising fuelling, boost and timing for a safe, reliable power and torque gain. Stage 2 is for vehicles with supporting modifications such as an upgraded intercooler, exhaust or induction, allowing a bigger tune. Stage 3 is a more aggressive tune built around further hardware upgrades such as a bigger turbo, injectors or clutch, and is tailored to the individual vehicle.

Are sound maps (pops, bangs and popcorn tuning) legal and will it affect my MOT?

Pops and bangs tuning (petrol) and popcorn/hard-cut tuning (diesel) both adjust fuelling for exhaust effect and can be dialled back for road use. Excessive noise can result in an MOT or roadworthiness issue, so this is set up responsibly and can be adjusted to suit.

Performance & Efficiency Tuning

ECU Remapping for Turbo Diesels

Q: Is ECU remapping legal in the UK?

Performance and economy remapping itself is legal, but you must inform your insurer as it can affect your policy, and the vehicle must still meet MOT and emissions requirements. Removing or disabling emissions equipment such as the DPF, EGR or AdBlue system is not legal for a vehicle used on the public road and is offered by Hebden Auto Tech for off-road and motorsport use only.

Q: Will a remap void my warranty?

A manufacturer or dealer warranty can be affected by a remap. Your original factory file is always backed up before any work so the ECU can be returned to standard if needed.

Stage 1 through to Stage 3, EGR/DPF/AdBlue solutions, speed limiter changes and sound maps — all built around software-based remapping, tailored to your vehicle rather than a generic file off the shelf.

Try the Remap Calculator Ask a Question

Remap Stages

Choose the level that suits your vehicle

Every remap is built for the individual car — figures below are typical examples only. Head to the calculator for a gain estimate specific to your vehicle, then get in touch for an affordable price.

Stage 01

Stage 1

Software only · no hardware changes needed

BHP

+20–25%

Torque

+25–30%

Works within standard hardware limits
Improved throttle response
Can improve fuel economy when driven the same way
Fully reversible — original file always backed up

Check Stage 1

Popular Stage 02

Stage 2

For vehicles with supporting mods

BHP

+30–40%

Torque

+35–45%

Best with upgraded intercooler, exhaust or induction
Bigger gains than Stage 1 across the rev range
Tune matched to your supporting mods
Original file backed up before any work

Check Stage 2

Stage 03

Stage 3

Built around bigger hardware upgrades

BHP

40%+

Torque

45%+

For turbo, injector, clutch & supporting upgrades
Fully custom, vehicle-specific tune
Discussed and built around your setup
Best suited to modified & track-driven vehicles

Discuss Stage 3

Emissions Solutions

EGR, DPF & AdBlue (SCR) Work

EGR, DPF and AdBlue/SCR software solutions can be carried out where a vehicle has a genuine mechanical fault, or for vehicles used off-road or in motorsport. These changes affect a vehicle's emissions output and road-legal status, so they're discussed honestly with you before any work is booked in.

EGR valve software solutions
DPF software solutions
AdBlue / SCR system solutions

Important legal notice

Disabling or removing an emissions control device (EGR, DPF or AdBlue/SCR) is illegal for a vehicle used on public roads in the UK and will fail an MOT emissions check. This work is offered strictly for off-road, motorsport or non-road-legal use, or to correct a genuine fault as part of a repair. It is the vehicle owner's responsibility to ensure the vehicle remains compliant, insured and road-legal for its intended use. We're happy to talk this through honestly before you book anything in.

Petrol

Pops & bangs, overrun

Diesel

Popcorn / hard-cut, limiter

Aggression level is set to suit you and your vehicle — from a subtle crackle to a full motorsport-style sound map, paired with your remap stage.

Sound Maps

A bit more drama from the exhaust

On petrol vehicles, pops and bangs tuning adjusts the fuelling map on lift-off throttle to produce crackles, pops and the occasional bang from the exhaust — without hurting how the car drives day to day.

Turbo diesels don't produce the same overrun pops, so instead there's a popcorn limiter (hard-cut) map — a controlled fuel cut at the rev limiter that gives a distinctive popping, anti-lag style stutter. Both are mapped alongside your chosen remap stage, with the aggression level set to suit you.

As with any tune that increases exhaust noise, this can affect roadworthiness/MOT if set too aggressively for road use — we'll set this up sensibly and talk you through it.

Speed Limiters

Speed limiter removal, adjustment & addition

Whether it's removing a factory or fleet-imposed speed limiter, raising an existing limit, or adding a limiter to a vehicle (useful for young or new drivers, or fleet/commercial vehicles), this is done as part of the remap file.

Removal / Increase

Remove or raise a factory, fleet or commercial vehicle speed limiter as part of your remap.

Addition

Add a speed limiter to a vehicle — popular for new drivers, work vehicles or fleet policy.

FAQs

Remapping questions, answered straight

What is the difference between Stage 1, 2 and 3?

Stage 1 works within the standard hardware for a safe, reliable gain. Stage 2 suits vehicles with supporting mods like an upgraded intercooler or exhaust, allowing a bigger tune. Stage 3 is built around further hardware upgrades such as a bigger turbo or injectors, and is tailored individually.

Is ECU remapping legal in the UK?

Performance and economy remapping is legal, but you should inform your insurer as it can affect your policy, and the vehicle must still pass its MOT. Removing emissions equipment (DPF/EGR/AdBlue) is not legal for road use and is offered for off-road/motorsport use only — see our legal notice above.

Will a remap void my warranty?

It can affect a manufacturer or dealer warranty. Your original factory file is always backed up before any work, so the ECU can be put back to standard if needed.

Are sound maps (pops, bangs & popcorn tuning) legal, and will it affect my MOT?

Pops and bangs (petrol) and popcorn/hard-cut tuning (diesel) both adjust fuelling for exhaust effect and can be dialled back for road use. Set too aggressively it can cause an MOT/roadworthiness noise issue — we set this up sensibly and can adjust to suit.

Do you remap petrol cars too?

Yes — remaps are available for petrol and diesel vehicles alike. Get in touch with your make, model and engine and it'll be quoted the same as anything else.

Do I need to bring my car in, or can you come to me?

Both — Hebden Auto Tech is home-based and offers a mobile service to come to you, or your vehicle can be collected and dropped back once the work is done. Get in touch to arrange whatever's easiest.

Next step

See what your vehicle could gain

Get a vehicle-specific gain estimate using our free remap calculator, then get in touch for an affordable price.

Try the Remap Calculator