S58 Stage 2+ xHP

The complete S58 performance system. Engine + Transmission + Fuel

Stage 2+ is the most advanced bolt-on performance package for BMW M vehicles powered by the S58 engine.

It brings together ECU tuning, transmission tuning, and FlexFuel support into one fully integrated system — allowing your BMW to safely run pump gas or ethanol blends while delivering the highest power this platform can achieve without upgrading turbos.

This is where the S58 becomes a true high-performance system, not just a tuned engine.

What you get

✔ Up to 780–820 horsepower potential (fuel-dependent)

✔ Massive gains in acceleration and top-end power

✔ Ethanol FlexFuel support (E30–E85 capable)

✔ Automatic map switching for pump gas or ethanol

✔ Faster, firmer, more responsive shifting

✔ Full control and monitoring through the MHD app

What’s included

Everything required for a complete Stage 2+ build:

✔ DME unlock

✔ MHD ECU tuning with Super License

✔ xHP transmission tuning (configured for your setup)

✔ FlexFuel kit (hardware included)

✔ Required bolt-on airflow, exhaust & cooling upgrades

✔ Mobile DME removal and reinstallation

✔ Mobile hardware installation

How it works

We come to you and handle the entire process.

Your DME is removed and unlocked using a specialized process.

While it is being unlocked, we install the FlexFuel system and all required hardware.

Once unlocked, we return, reinstall the DME, configure MHD and xHP, and verify the system.

Typical turnaround: 5–7 business days

Your BMW stays with you the entire time.

Compatible with

BMW M2 (G87)

BMW M3 (G80)

BMW M4 (G82 / G83)

BMW X3 M (F97)

BMW X4 M (F98)

Including Competition models.

Why Stage 2+

Stage 2+ is for owners who want everything working together:

• Engine tuned for maximum output

• Transmission calibrated for real performance

• Fuel system ready for ethanol power

• All supporting hardware installed and matched

This is the highest level of S58 performance available without upgrading turbos — designed to be powerful, reliable, and fully controlled.