2018 GLC63s: Aussie Muscle Meets German Precision

Revhigh Performance Tuning
Aug 15
2 min read

When you take AMG’s 2018 GLC63s — already one of the punchiest SUVs on the road — and give it a few choice upgrades, you end up with a proper weapon. This isn’t about bolting on random parts; it’s about fine-tuning performance so every drive feels like a special occasion.

Downpipes for Breathing Room

The stock exhaust system is good, but those factory cats and pipes can hold things back. By fitting high-flow downpipes, we’ve let the 4.0L twin-turbo V8 breathe properly. That means quicker spool, more punch down low, and a throatier growl.

Switchable Crackle: Two Cars in One

Sometimes you want refined. Sometimes you want pops and bangs that make heads turn. With switchable crackle, you choose. It’s civilised for the school run, but a hooligan when the road opens up.

ECU & TCU Tuning – Dyno Proven

Both the engine and transmission have been tuned to work together perfectly. ECU tuning sharpened the throttle and power delivery, while TCU tuning sped up gear changes and kept the torque curve in the sweet spot. We tested and refined it on the dyno for accuracy, then proved it on the street.

The result? This GLC63s isn’t just louder — it’s smarter, quicker, and a lot more fun. Whether you’re carving up a twisty road or cruising the motorway, it now delivers a blend of brutality and refinement you just don’t get from stock. 📊 Dyno Results:

Before:

606.9 Nm @ 104 km/h

331.1 kW @ 190 km/h

After:

715.3 Nm @ 98 km/h

410.2 kW @ 206 km/h

🚀 Gains:

+108.4 Nm torque

+79.1 kW power