Mercedes-Benz SLK 55 AMG V8 421hp Remap
Expected gains of +19 BHP and +25 Nm torque
Get Your Free Quote ↓BHP+19 hp (5%)
Standard
421 hp
Tuned
440 hp
Torque+25 Nm (5%)
Standard
540 Nm
Tuned
565 Nm
Suitability
Limited (3/10)Gains Profile
Limited headroomHeadroom
LowMercedes-Benz SLK 55 AMG V8 421hp ECU Remapping
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.
How this engine compares
- 7thof 12 Mercedes-Benz SLK engines by power gain
- 13%of the 9,842 engines we hold gain data for see a smaller power increase
- 14%of engines with torque data see a smaller torque increase
Comparisons are calculated from our own recorded Stage 1 figures.
Assessment
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.
Considerations
!Naturally aspirated engine: gains are usually limited; results vary widely.
!High tuned torque: check transmission torque capacity and service history.
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