Akrapovič BMW M340I/M440I (G20/G21/G22/G23/G26) Sound Kit

The optional Akrapovič Sound Kit gives owners of selected Akrapovič car exhausts genuine, direct control over the sound of their system from the cockpit of the current-generation M340i and M440i, including the M440i Gran Coupe. Rather than being locked into whatever character the car's drive mode happens to dictate, this kit puts that decision back in your hands, letting you switch between a quiet, more restrained mode and a genuinely sportier, more dynamic sound on demand, whenever and wherever suits you.

At the core of the system is a receiver, already integrated as part of the Evolution system, which drives the actuators responsible for physically opening or closing the valves at the end of the exhaust, a system that already features two valves and integrated acoustic reflectors directing sound into the cabin on the Slip-On Line base system. You can regulate these valves in two ways: through Akrapovič's dedicated Sound Remote Controller, a simple, purpose-built hardware unit, or through their smartphone app, available for both iOS and Android, giving you genuinely flexible, on-the-fly control without needing a separate physical remote rattling around in the car.

This is a genuinely popular addition for owners who want the deeper, more resonant character of Akrapovič's Evolution Line system for weekend or track driving, while still being able to dial things back to something more neighbour-friendly for the daily commute or a long motorway drive, all from the same underlying exhaust hardware rather than needing to compromise on one setting permanently.

Important: using this optional Sound Kit invalidates ECE type approval for the exhaust system it's fitted to, a genuine trade-off since the base Slip-On Line system meets that approval on its own with no remapping required. If retaining road-legal type approval matters for your specific market or use case, this is worth weighing carefully against the genuine convenience and flexibility the kit provides.

Why Choose This Sound Kit

• Genuine cockpit control over exhaust sound, entirely independent of the car's drive mode
• Switch between a quiet, restrained mode and a sportier, more dynamic sound whenever you choose
• Control via Akrapovič's dedicated Sound Remote Controller or their smartphone app (iOS/Android)
• Receiver already included as part of the Evolution system, no extra hardware installation required beyond the kit itself
• Genuinely useful for balancing daily-driver civility with weekend or track-day character

Compatibility

• BMW M340i (G20/G21), 2020-2024
• BMW M440i (G22/G23), 2020-2024
• BMW M440i Gran Coupe (G26), 2020-2024

Requires: an existing Akrapovič exhaust system with Evolution valve actuators fitted (Slip-On Line Titanium and/or Evolution Link Pipe Set), sold separately.