Akrapovic BMW M340i (G20, G21) Evolution Line S-BM/T/30H

The Akrapovic BMW M340i (G20, G21) Evolution Line S-BM/T/30H is engineered to extract the maximum potential from your BMW M340i’s straight-six engine. Constructed entirely from ultra-light high-grade titanium and finished with hand-crafted carbon-fibre tailpipes, this exhaust system delivers a substantial performance boost along with an aggressive, race-inspired sound profile. Designed for non-OPF vehicles and intended exclusively for track use, this system is a testament to Akrapovič’s legacy of precision engineering and motorsport heritage.

Advanced Materials and Innovative Design

At its core, the Evolution Line system is built using ultra-light titanium, which significantly reduces overall weight. With a weight of only 21.7 kg—a 23% reduction compared to the stock unit—it improves the power-to-weight ratio, enhancing handling and responsiveness. The system replaces the single stock exhaust pipe with two separate central link pipes made from high-grade austenitic stainless steel. This dual-pipe configuration optimizes exhaust gas flow from the downpipe to the muffler, reducing back pressure and maximizing engine breathing efficiency.

Dual-Valve and Tuned Resonators of Akrapovic BMW M340I (G20, G21) Evolution Line S-BM/T/30H

A standout feature is the incorporation of two valves—one more than the stock configuration. These valves are precisely calculated to tailor the sound signature of the exhaust. An included TNG controller activates the additional valve, allowing the system to deliver two distinct acoustic profiles:

• Low to Mid-Range: At normal cruising speeds, the dual-mode ECU-controlled valves ensure a smooth, refined exhaust tone with no unwanted drone, perfectly suited for everyday driving.
• High-Revs: When the engine is pushed hard, the valves open fully, releasing a higher-pitched, aggressive racing tone that echoes the spirited performance of the BMW M340i.
  Additionally, the system features two tuned resonators developed specifically for this engine. These resonators produce a deep, rich, and sporty sound that enhances the overall auditory experience without causing streaming or drone in the cabin.

Exquisite Visual Appeal

The Evolution Line not only enhances performance but also delivers a striking visual upgrade. The exhaust is finished with hand-crafted carbon-fibre tailpipes that are as durable as they are eye-catching. These tailpipes are designed not just for aesthetics—they help direct the sound into the cabin, adding to the immersive driving experience. Every detail, from the sleek titanium body to the precision-engineered stainless steel link pipes, reflects Akrapovič’s commitment to quality and design excellence.

Performance Gains of Akrapovic BMW M340I (G20, G21) Evolution Line S-BM/T/30H

Dyno testing has shown that the Evolution Line system provides significant performance improvements:

• Maximum Power: Increases from 280.4 kW to 286.9 kW (+8.7 kW) at around 5600 rpm.
• Horsepower: A boost of approximately +11.8 HP (metric) is recorded.
• Maximum Torque: Rises by +17.1 Nm at 4100 rpm.
• Weight Savings: The system is 6.5 kg lighter than the stock exhaust, improving the car’s agility and overall performance dynamics.

These gains translate to more responsive throttle action, sharper acceleration, and an overall more exhilarating track performance.

Installation and ECU Remapping

The Akrapovic BMW M340i (G20, G21) Evolution Line S-BM/T/30H is designed as a plug-and-play cat-back system, meaning it replaces the stock exhaust from the catalytic converters back. However, for perfect performance, throttle response, and durability, a specially developed ECU remapping is required. This remap ensures that the engine’s management system is optimized for the freer flowing exhaust and enhanced acoustic characteristics. Installation typically requires around 300 minutes and should be performed by experienced professionals.

Fitment and Ordering Requirements of Akrapovic BMW M340I (G20, G21) Evolution Line S-BM/T/30H

Please note:

• This Evolution Line system is designed only for non-OPF vehicles. For such vehicles, the ECE type approval certificate is not valid.
• Both product codes, S-BM/T/30H and E-BM/SS/8, must be ordered due to packaging constraints.
• This product is meant strictly for track use and does not meet emission compliance requirements for street or highway use.
• An extra stock valve actuator (part nr. 18 30 8 686 640) is required when installing the slip-on exhaust on BMW M340i and M440i, and the system also fits the BMW M340i xDrive Touring (G21).

Conclusion

The Akrapovic BMW M340i (G20, G21) Evolution Line S-BM/T/30H is a high-performance exhaust system that redefines the limits of your BMW’s engine. With its ultra-light titanium construction, innovative dual-valve design, and meticulously tuned resonators, it delivers a noticeable boost in power and torque along with an aggressive yet refined sound profile. Engineered for the track and built for enthusiasts who demand uncompromising performance, this Evolution Line exhaust is the perfect upgrade for those looking to elevate their driving experience. Embrace the fusion of cutting-edge technology and motorsport heritage with Akrapovič, and take your BMW M340i to new heights of performance and style.