Why supporting hardware matters
Stage 2 usually refers to a calibration developed around hardware changes. There is no universal Stage 2 parts list: requirements differ by engine, turbocharger, ECU and gearbox. Intake, cooling, exhaust and drivetrain changes must be assessed for the particular application.
Buying parts before compatibility is checked can create avoidable cost. Provide an accurate list of fitted parts and any existing software so the complete combination can be reviewed.
Information needed for a useful quote
- Registration, engine and gearbox details, current mileage and service history.
- A list of supporting modifications and part details, where known.
- Any running issues, warning lights or previous calibration work.
- Intended use and location, including safe access for any proposed mobile work.
Checks come before calibration
Boost, fuelling, cooling and drivetrain issues should be diagnosed before software changes. A remap is not a repair for a failing component. Supporting modifications may require installation, inspection or workshop work outside the scope of a mobile software visit.
We confirm the work proposed and what the quote includes. Gains vary, and the Stage 2 name does not establish a fixed BHP figure or guarantee that a vehicle is road legal.
UK road-use and emissions requirements
Before changing ECU software, check that the vehicle is suitable, free from unresolved faults and maintained correctly. The engine, turbo, gearbox, clutch and fuel quality can all affect what is appropriate. We do not promise a fixed power increase, fuel saving or result for every vehicle.
Road vehicles must continue to meet applicable emissions and safety requirements. Removing or disabling factory emissions equipment can cause MOT failure and make a vehicle illegal for road use; passing an MOT alone does not establish legality. Off-road, motorsport or export descriptions do not make a modification automatically lawful. Specialist work requires case-specific checks and must not conceal faults.
Tell your insurer about proposed modifications before use and check any finance, lease or manufacturer warranty conditions. Ask for a vehicle-specific assessment before deciding on a calibration.
Further guidance: GOV.UK guidance on diesel particulate filters and road use.
Compare against Stage 1
If the car is standard, Stage 1 suitability may be the more relevant starting point. Choose based on the condition, hardware and intended use of the vehicle, rather than the stage number.
Questions before you book
Does Stage 2 require emissions equipment removal?
A stage label does not define a single hardware recipe or establish legality. Road vehicles must remain compliant; do not assume emissions-system removal is acceptable.
Can Stage 2 be completed on the driveway?
It depends on ECU access, fitted hardware, checks required and working conditions. Some supporting work needs a workshop or other arrangements.
Can you quote from the registration alone?
The registration is a useful starting point, but an accurate hardware list and current vehicle condition are also needed for modified vehicles.