Akrapovic Exhaust System for BMW M340i / M440i (G20, G21, G26)

Offering a noticeable weight savings, increased power and torque, and a dramatic soundtrack, this system is constructed from lightweight high-grade titanium and completed with hand-crafted carbon-fibre tailpipes. The system offers an 11.89 kg savings over the standard stock system, an incredible difference of 33%. Power and torque are increased by 3.4 Kw (4.6 hp) at 2,650 rpm and 12.4 Nm at 2,650 rpm when tested on the Akrapovic dyno against a BMW M440i with a standard stock exhaust. An exhilarating soundtrack is delivered through the use of special parts fitted in the system. Two valves – instead of one, as in the stock configuration – are calibrated to tailor the sound, and two acoustic reflectors are fitted on the tailpipes to guide the sound into the car’s cabin and change the driving experience, producing a fully immersive sound in the car’s cockpit, to supply thrills and enjoyment that can be enjoyed by all occupants. Because the Akrapovic Slip-On Line (Titanium) exhaust system has two valves, one more than the stock configuration, a TNG controller is included in the product to activate the additional exhaust valve. Two resonators, one on each side of the central muffler, perfect the sound experience. The smooth, rich sound at normal cruising rises to a deep and sporty soundtrack when driving more enthusiastically, and the tones can also be controlled from within the cockpit with addition of the optional Akrapovic Sound Kit. Special parts are cast in the Akrapovic in-house foundry to create the intricate and complex items needed for this system. It meets ECE type approval, and no remapping is needed for this configuration (the system only fits vehicles equipped with the OPF filter, and the ECE certificate is valid only for these cars; for non-OPF vehicles, an Evolution Line system is available). An optional link pipe set is available for those customers looking for an upgrade to the Slip-On Line (Titanium) exhaust system.

Fitment notice: This product fits on the BMW M340i equipped with an OPF.

An extra stock valve actuator (part nr. 18 30 8 686 640) is needed when installing the Slip-On exhaust system on BMW M340i (G20, G21) and M440i (G22, G23, G26).

This product also fits on the BMW M340i xDrive Touring (G21) model.

Evolution Link Pipe Set (SS) was tested and developed together with Slip-On Line (Titanium).

Please note that both product codes, S- BM/T/18H and E-BM/SS/8 must be ordered for cars without otto / gasoline particulate filter.

Fitment notice: The Evolution Line (Titanium) only fits on non-OPF vehicles. For non-OPF vehicles, the ECE type approval certificate is not valid.

This product also fits on the BMW M440i xDrive Cabriolet (G23) model.

THIS PRODUCT DOES NOT MEET EMISSION COMPLIANCE REQUIREMENTS FOR STREET OR HIGHWAY USE.

This product is crafted from high-quality stainless steel, with the front part of the downpipe cast in Akrapovic’s in-house foundry. A sporty 300 cpsi catalytic converter is integrated into the downpipe, with the heat insulation made of stainless steel and a flexible tube incorporated into the middle section. Power gains with an Evolution Line (Titanium) fitted with the Akrapovic downpipe of 18.7 kW (25.4 hp) at 5,600 rpm and torque increases of 34.7 Nm at 2,400 rpm have been recorded when tested on the Akrapovic dyno against a BMW M440i with the standard stock exhaust. It delivers a pure racing sound, full of emotion and adrenalin-inducing enjoyment, and great feedback at high revs, all without unwanted drone. This product is meant for racetrack use only, and remapping the ECU is mandatory in order to prevent potential “check engine light” warning signals.

The downpipe is an optional product for the following Evolution Line (Titanium) exhaust systems:

BMW M340I (G20) without OPF/GPF: Slip-On Line (Titanium) + Evolution Link pipe (SS) - S-BM/T/17H + E-BM/SS/8

BMW M440I (G22) without OPF/GPF: Slip-On Line (Titanium) + Evolution Link pipe (SS) - S-BM/T/18H + E-BM/SS/8

Fitment notice: Product does not fit on cars equipped with B58TU2 engine.

THIS PRODUCT DOES NOT MEET EMISSION COMPLIANCE REQUIREMENTS FOR STREET OR HIGHWAY USE.

The optional Akrapovic Sound Kit enables owners of selected Akrapovic car exhausts to control the sound of the system from the cockpit of their machine. Using Akrapovic technology, drivers can easily switch between the quiet mode and a sportier sound. With the use of a receiver (already included in evolution system) to drive the actuators that open or close the valves at the end of the exhaust system, drivers can use the Sound Remote Controller to regulate the valves.

With the use of the optional Akrapovic Sound Kit, the ECE type approval is no longer valid.

Pictures are symbolic.

Schematic new version:

Performance graph:

Installation instructions - EN:

Installation instructions - DE, IT, FR, ES, PT, SI:

ECE Type-Approval Certificate:

POS HF:

STOCK EXHAUST; BMW M440I (G22)

SLIP-ON LINE (TITANIUM); BMW M440I (G22)

Schematic new version:

Installation instructions - EN:

Installation instructions - DE, IT, FR, ES, PT, SI:

Installation instructions - EN:

Installation instructions - DE, IT, FR, ES, PT, SI:

Performance graph:

POS HF:

Schematic new version:

Installation instructions - DE, IT, FR, ES, PT, SI:

User manual - EN:

User manual - DE, IT, FR, ES, PT, SI:

Installation instructions - EN:

POS HF: