Expected gains of +19 BHP and +25 Nm torque
Get Your Free Quote ↓Considering an ECU remap for your Mercedes-Benz SLK 55 AMG V8 421hp? A Stage 1 remap can take this R172 - 2011 -> petrol engine from 421 BHP to 440 BHP and from 540 Nm to 565 Nm of torque (naturally aspirated). This engine scores 3/10 for remap suitability. Get a free personalised quote from a trusted remap professional and find out exactly what your Mercedes-Benz SLK can achieve.
The Mercedes-Benz SLK 55 AMG V8 421hp is a 5.5L naturally aspirated petrol engine producing 421 BHP and 540 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 440 BHP and 565 Nm — a gain of around 19 BHP (5%) and 25 Nm (5%).
This engine has low remap suitability, though the available headroom is limited, so gains are modest compared to higher-output variants. The tuning headroom is classified as limited, based on the percentage gain available from the factory output.
Considerations: Naturally aspirated engine: gains are usually limited; results vary widely.. High tuned torque: check transmission torque capacity and service history.
All figures shown are typical estimates based on aggregated Stage 1 data for this engine variant. Actual results depend on vehicle condition, mileage, and the chosen tuning method. We recommend discussing your specific vehicle with a qualified remap professional.
| Engine | BHP | Gain | Torque | Gain | Score |
|---|---|---|---|---|---|
| 200 (1.8T) 184hp | 184 → 210 | +26 | 270 → 380 | +110 | Good (7.5/10) |
| 250 (1.8T) 204hp | 204 → 220 | +16 | 310 → 380 | +70 | Good (7/10) |
| 250 CDI 204hp | 204 → 240 | +36 | 500 → 580 | +80 | Good (7/10) |
| 350 - 306hp | 306 → 320 | +14 | 370 → 390 | +20 | Limited (3.5/10) |
Get a personalised remap quote for your Mercedes-Benz SLK. We'll connect you with a trusted professional in your area.
All figures shown are typical estimates based on aggregated Stage 1 data for this engine variant. Actual results depend on vehicle condition, mileage, and the chosen tuning method.
We recommend discussing your specific vehicle with a qualified remap professional before proceeding.