| Weistec Horsepower | 520 |
| Weistec Torque | 464 |
| CARB Exempt ID | D-691-3 |
| Manufacturer | Weistec |
| Street legal in all the US States | Yes |
| Engine Family | M156 |
| See more | |
| year | make | model | trim | engine |
|---|---|---|---|---|
| 2011 | Mercedes-Benz | SL63 AMG | Roadster (R230) | NA 6.2L V8 (M156) |
| 2010 | Mercedes-Benz | SL63 AMG | Roadster (R230) | NA 6.2L V8 (M156) |
| 2009 | Mercedes-Benz | SL63 AMG | Roadster (R230) | NA 6.2L V8 (M156) |
| 2008 | Mercedes-Benz | SL63 AMG | Roadster (R230) | NA 6.2L V8 (M156) |
| 2007 | Mercedes-Benz | R63 AMG | Base (W251) | NA 6.2L V8 (M156) |
| 2011 | Mercedes-Benz | ML63 AMG | Base (W164) | NA 6.2L V8 (M156) |
| See more | ||||
Product Description
The M156 is a genuine landmark, AMG's first V8 designed and built entirely in-house at Affalterbach rather than adapted from an existing Mercedes-Benz engine, and it went on to become the last naturally aspirated V8 AMG ever produced before the industry-wide move to turbocharging. Each 6.2-liter M156 was hand-assembled by a single technician under AMG's "one man, one engine" principle, that technician's own signature stamped on the intake plaque, and the engine backed up that craftsmanship by winning International Engine of the Year honors twice. It powered the W204 C63 AMG and W212 E63 AMG among others, and enthusiasts still talk about its high-revving character and sound, a personality that got harder and harder to replicate once forced induction took over the segment.
Weistec's calibration for the M156 is a software recalibration of the factory ECU, sharpening the fueling, ignition, and throttle mapping AMG already engineered rather than working around it. It's good for a meaningful gain, 451 to 520 horsepower and 443 to 464 lb-ft of torque on pump gas, built to the same validation standard as the factory's own calibration work, with knock protection, thermal management, and OEM diagnostics left fully functional the whole way through. W.1 is CARB EO-certified and 50-state legal, so that extra output comes with zero compliance compromise. An icon of an engine, tuned to sing even louder.
Related Items
How Do You Get Your M156 ECU Tune Tuned?
Follow these steps — this is what your specific vehicle needs and supports.
2
Choose Your Tune Stage
3
Core Improvements
Standard with this tune4
Free Add Ons
Want it louder?
This tune can have Burble/Pops added or increased on deceleration, at no additional charge. Select an intensity below and we'll add it to your order, or mention it when requesting your tune — through the Cypher+ app, your calibration request form, or when placing your order.
5
See the full tuning process →
Pick Your Tuning Method
1Selected
Cypher Plus
Order a Cypher Plus and tune your car yourself from your phone, entirely through the MyFlasher app. Watch how it works.
2Selected — Pick return shipping at checkout
Mail It In
Remove your ECU or TCU and mail it to us for tuning. Required for some applications.
3Selected — Pick Will call at checkout
In Person
Bring your vehicle, or just your ECU/TCU, to our Anaheim, CA headquarters. Call 714-202-0005 or email sales@weistec.com to schedule.
4Selected — Order through your local dealer
Cypher Pro Dealer
Visit a certified Cypher Pro Dealer near you. Find one with our dealer locator.
6
Complete The Upgrade
An ECU tune alone won't remove all factory limits or fix how power reaches the ground. Add these to round out the upgrade with no limitations.
Read the full CPC & TCU breakdown →
What is a CPC module?
The CPC (Central Powertrain Control) is a separate control unit that manages things like the active exhaust valves, radiator fan, intercooler pumps, and speed limiter. On many newer Mercedes-Benz vehicles, it also houses torque limiters that can hold back an ECU tune from reaching its full potential.
What is a TCU tune?
A TCU (transmission control unit) tune delivers faster, firmer shifts with higher line pressure, reducing clutch slip and increasing the transmission's torque capacity. It's a worthwhile upgrade on its own, or paired with an ECU tune for a fully sorted powertrain.
Your Total
Good to Know
- This is a reflash of your original module, not a stand-alone unit.
- Power gains vary by vehicle, modifications, fuel, and operating conditions (ambient temperature, altitude, etc.).
- New or upgraded spark plugs are always recommended when tuning.
- Product may not be emissions compliant. Check local laws prior to installation.
- Always use a battery charger during programming.