The M156 6.2L V8 is one of AMG’s most iconic engines — a hand-built, naturally aspirated powerhouse known for its sharp throttle response, raw character and huge tuning potential. Found in early AMG models including the W204 C63, W211 E63, and the W221 S63 (2007–2010), the M156 platform delivers thrilling performance and responds exceptionally well to ECU calibration, intake upgrades and exhaust enhancements.
At Boost Performance, we specialise in extracting safe, reliable gains from the M156 while preserving its unique naturally aspirated feel. Every calibration is developed in-house and validated on our World-Class Dyno for maximum accuracy, drivability and repeatability.
Stage 1 — 500 bhp (507 PS) / 470 lbft (637 Nm)
STAGE 1 — ECU Remap (Stock Hardware)
What’s Included
-
Bespoke ECU calibration
-
Ignition timing optimisation
-
Throttle sensitivity refinement
-
Torque modelling adjustments
-
Full dyno health check + power printout
-
Optional TCU gearbox tune
Recommended For
Drivers wanting instant improvement on a stock car — sharper response, smoother power delivery and stronger mid-range torque.
Benefits
-
Faster throttle response
-
Improved mid-range pull
-
More linear power delivery
-
Sharper gear changes (with optional TCU tune)
Stage 1 – ECU Remap
£449 + VAT
£538 inc. VAT
Stage 2 — 520 bhp (527 PS) / 490 lbft (664 Nm)
STAGE 2 — ECU + Exhaust Flow Upgrade
Required Hardware
-
High-flow panel filters or intake upgrade
-
Primary/secondary decat or sports cats
-
X-pipe / resonator delete optional
What’s Included
-
Complete ECU recalibration for upgraded exhaust flow
-
AFR & timing refinement
-
Exhaust burble/tone optimisation (optional)
-
Dyno testing & logging
Recommended For
Owners wanting more sound, better breathing and stronger mid-range performance without opening the engine.
Benefits
-
More aggressive exhaust tone
-
Increased high-rpm airflow
-
Sharper top-end power
-
Stronger torque curve across the rev range
Stage 2
£599 + VAT
£718 inc. VAT
Stage 3 — 540–575 bhp (547–583 PS) / 500+ lbft
STAGE 3 — Cams, Headers & Full NA Package
Required Hardware
-
Long-tube headers
-
Upgraded cams (various profiles available)
-
Performance intake system
-
High-quality exhaust system (catback recommended)
-
Optional: lightweight pulleys
What’s Included
-
Complete performance ECU remap
-
Cam timing optimisation
-
Fuel mapping refinement
-
Extensive dyno logging & calibration sessions
-
Optional TCU tune (for quicker downshifts)
Recommended For
Drivers who want the ultimate NA M156 experience — maximum response, aggression, sound and high-rpm power.
Benefits
-
Noticeable increase in top-end horsepower
-
More aggressive throttle and cam profile noise
-
Substantially better airflow & scavenging
-
Track-ready consistency
Stage 3
£899 + VAT (mapping only — hardware priced separately)
£1,079 inc. VAT