Akrapovič BMW M135i (F40) 2020-2024 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 BMW M135i F40. 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. You can regulate these valves in two ways: through Akrapovič's dedicated Sound Remote Controller, a simple, purpose-built hardware unit, or through their more recently developed smartphone app, available for both iOS and Android. The app route in particular gives you genuinely flexible, on-the-fly control without needing a separate physical remote rattling around in the car, useful for anyone who wants that flexibility without extra clutter.

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. 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 M135i (F40), 2020-2024

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