Want more punch from your diesel or turbo-petrol but not sure how far to go? This guide pits Stage 1 against Stage 2 so you can choose the right path for power, budget and daily drive comfort.
Power & torque gains at a glance
| Stage 1 remap | Stage 2 remap | |
|---|---|---|
| Typical BHP increase | +20–35 % | +35–60 % |
| Typical torque increase | +25–40 % | +40–70 % |
| 0-60 mph improvement* | -0.8 s | -1.4 s |
| Fuel economy change* | Often +5 % | -5 % to flat |
*Real-world average on turbo diesels. Figures vary by model.
What you need before each stage
Stage 1: software only
- Healthy engine with up-to-date service history
- Clean air filter & fresh oil
- No warning lights on dash
Stage 2: hardware + software
- High-flow downpipe or sports cat
- Free-flow intake and upgraded intercooler
- Stronger clutch (manual) or TCU tune (DSG)
- Wideband boost and AFR logging recommended
Proof on the rollers
How much does each stage cost?
| Item | Stage 1 | Stage 2 |
|---|---|---|
| ECU remap (software) | £250 | Included |
| Required hardware | N/A | £600–£1 200* |
| Fitting & setup | N/A | £300–£500 |
| Total ballpark | £250 | £1 200–£1 700 |
*Depends on turbo size and exhaust spec.
Want instant answers? Pop your reg in our remap calculator to see Stage 1 and Stage 2 gains for your exact car.
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