S63 / S68 Custom Tune

S63 / S68 Custom Calibration. Power That Holds, Not Just Peaks.

The S63 isn’t about making one clean pull, it’s about surviving load.

Most tunes push low-end torque too hard, build heat fast, and fall apart after one run.

We avoid that completely.

• controlled torque delivery
• proper thermal management
• consistent power, pull after pull

We’ve dialed stock turbos cars push into the 750+hp range on pump fuel and 850+hp with Ethanol Blend, proper setups, safely, not forced.

No inflated numbers. Just power you can actually use.

The focus is real power, consistent, repeatable, and proven both on the dyno and on the road.

Fully supported on MHD Tuning and bootmod3.
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Support & Process

How the process works

1. Purchase your custom tune
2. Receive your base calibration file
3. Flash and send datalogs
4. We review, refine and send revision
5. Final file delivered once fully dialed in

Simple process. Real calibration. No guesswork.

Support & Communication

All tuning support is handled by email to keep the process structured and efficient.

You’ll receive:

• Calibration revisions
• Log review and feedback
• Direct support during and after tuning

No scattered messages. No wasted time. Just proper support.