117 CS+ vs. Stock BMW CS: G80 M3 Dyno Results

The Truth Behind the Tune: G80 M3 117 CS+ Dyno & Data We’ve left the Eifel mountains and headed back to HQ to put the data to the test. In our last video, we pushed the G80 M3 to its absolute limit at the Nürburgring. It wasn’t just about hot laps; it was a grueling R&D session where we refined our CS+ and Stage 1 tuning through aggressive, real-world track testing with the team at MSB. We lived on the limit to find the perfect balance of cooling, delivery, and raw pace. Now, it’s time to see exactly what those track refinements translate to on the rollers. In this video, we deep-dive into the dyno graphs to compare the factory BMW CS software against our custom-developed 117 CS+ tune.