Mercedes-Benz SLK R172 - 2011 -> 55 AMG V8 421hp
Real standard and upgraded performance figures for the 55 AMG V8 421hp engine in the Mercedes-Benz SLK R172 - 2011 ->.
Standard vs. upgraded performance for the Mercedes-Benz SLK R172 - 2011 -> 55 AMG V8 421hp, based on real files we've processed for this exact engine.
| Horsepower (HP) | Torque (Nm) | |
|---|---|---|
| Standard | 421 | 540 |
| Stage 1 | 440 | 565 |
| Stage 2 | 449 | 577 |
- Make
- Mercedes-Benz
- Model
- SLK
- Generation
- R172 - 2011 ->
- Engine
- 55 AMG V8 421hp
- Fuel type
- Petrol
Frequently asked questions
Is Stage 1 tuning safe for the Mercedes-Benz SLK R172 - 2011 -> 55 AMG V8 421hp?
Yes — Stage 1 for this engine is a software-only remap calibrated to stay within its stock mechanical limits (turbo, clutch, fueling), so no hardware changes are required.
How much more power does the 55 AMG V8 421hp make after tuning?
Standard output is 421 HP / 540 Nm; Stage 1 on this engine typically reaches 440 HP / 565 Nm. Exact results can vary slightly with fuel quality and vehicle condition.
How long does a Mercedes-Benz SLK R172 - 2011 -> 55 AMG V8 421hp remap take?
Once your original file is uploaded through the member panel, most requests for this engine are completed within a few hours.
Can the 55 AMG V8 421hp be reverted to its original file?
Yes — we keep the original file on record for the request, so the ECU can be put back to stock at any time.