| Weistec Horsepower | 685 |
| Weistec Torque | 604 |
| Manufacturer | Weistec |
| Street legal in all the US States | No |
| Engine Family | M838T |
| Stock Horsepower | 562 |
| See more | |
| year | make | model | trim | engine |
|---|---|---|---|---|
| 2021 | McLaren | 540C | Base | Twin Turbo 3.8L V8 (M838TE) |
| 2020 | McLaren | 540C | Base | Twin Turbo 3.8L V8 (M838TE) |
| 2019 | McLaren | 540C | Base | Twin Turbo 3.8L V8 (M838TE) |
| 2018 | McLaren | 540C | Base | Twin Turbo 3.8L V8 (M838TE) |
| 2017 | McLaren | 540C | Base | Twin Turbo 3.8L V8 (M838TE) |
| 2016 | McLaren | 540C | Base | Twin Turbo 3.8L V8 (M838TE) |
| See more | ||||
Product Description
The 570S is McLaren proving that the full mid-engined, carbon-tubbed experience could be genuinely usable every single day without losing what makes a McLaren a McLaren. It kept the same DNA as its more track-focused siblings, the 650S and 675LT, while McLaren tuned it specifically for that everyday usability. Under the skin it runs the same 3.8-liter M838T twin-turbo V8 as the rest of the family, calibrated by the factory for 570 PS, and it stood as the lightest car in that V8 lineup, proof that McLaren's engineering could deliver the full experience without compromise.
Weistec's calibration for the 570S works from inside that factory M838T, recalibrating the software McLaren already engineered. Knock protection, thermal management, and every OEM diagnostic routine are left exactly as the factory built them. It's an OEM-level software recalibration, carried out with the same discipline as a factory tuning program, and it moves the 570S from a factory 562 hp and 443 lb-ft to 685 hp and 604 lb-ft. The 570S already delivered the real McLaren experience. Weistec's calibration makes sure it delivers on another level entirely.
How Do You Get Your 570s ECU Tune Tuned?
Follow these steps — this is what your specific vehicle needs and supports.
Choose Your Tune Stage
Core Improvements
Standard with this tuneFree Add Ons
Pick Your Tuning Method

Cypher Plus
Order a Cypher Plus and tune your car yourself from your phone, entirely through the MyFlasher app. Watch how it works.

Mail It In
Remove your ECU or TCU and mail it to us for tuning. Required for some applications.

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.

Cypher Pro Dealer
Visit a certified Cypher Pro Dealer near you. Find one with our dealer locator.
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.
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.
Fitment not confirmed
This part is not confirmed to fit your selected vehicle.




