Stage 1 & Stage 2
Stage 1 vs Stage 2: What's the Difference?
21 October 2026
The short answer
Stage 1 is a calibration for an engine on its standard hardware. Stage 2 is a calibration written for a defined set of supporting upgrades, such as an intercooler, intake or downpipe, specified for that engine.
Standard hardware
Stage 1 works within what the factory turbo, fuel system and cooling can support reliably. It is the right starting point for most drivers who want a stronger, more responsive car without fitting parts.
Supporting upgrades
Stage 2 assumes hardware changes that let the engine breathe and stay cooler under load. The exact parts vary by engine. A Stage 2 file for one engine is not a parts list for another, even within the same brand.
Calibration
Because Stage 2 changes airflow and temperatures, the calibration must match the installed parts. Running a Stage 2 file without the right hardware, or with unknown parts, is not something we recommend. Tell us exactly what is fitted.
Price and hardware
Stage 2 is usually priced on request because it depends on the parts you already have, the parts you need and any workshop fitting. Stage 1 prices are shown where they have been checked for that engine.
Which should I choose?
- Choose Stage 1 if your car is standard and you want a clear improvement with no parts.
- Consider Stage 2 if you already have, or plan to fit, the specified hardware and want more sustained performance.
Read more on Stage 1, Stage 2 and performance hardware packages, or plan it in the Tuning Builder.
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