Akrapovic Exhaust System for BMW Z4/M40i (G29)

Manufactured to exacting specifications from high-grade titanium – with parts cast in Akrapovic’s in-house foundry – this system utilises lightweight materials to reduce overall vehicle weight and optimize power and torque through the entire rev range. Meeting ECE type approval, the design of the system fully adapts to the lines of the car, and the single-muffler layout with four superb hand-crafted carbon-fibre round tailpipes give a distinctive look to the rear of the car. Various sound modes add to the experience, with a sporty and animated roar from the six-cylinder engine when the revs rise, and a more pleasing experience in comfort mode, ideal for cruising with the roof down.

An optional Akrapovic Sound Kit is available to control the various sound settings, and optional tuning opportunities exist through the addition of the stainless-steel Evolution Link Pipe set. As with the Sound Kit, fitting the Link Pipe will negate the ECE type approval.

Fitment and EC type-approval are valid for engine type B58B30C. ECE type approval is only valid for cars equipped with otto/gasoline particulate filter.

For installing the slip-on system, the stock exhaust system has to be cut. Please read the instructions carefully before the start of the installation.

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

The Evolution link pipe set upgrades the Slip-On system to the Evolution system. The Evolution link pipe set is constructed from high-quality austenitic stainless steel. It features an arrangement of two central link pipes for the best flow of the exhaust gases from the engine. It is designed to increase power and torque and reduce overall weight, while delivering a deep and sporty sound with no unwanted drone or streaming.

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

This evolution link pipe set does not fit on vehicles equipped with Otto particulate filter (OPF).

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

The Evolution link pipe set upgrades the Slip-On system to the Evolution system. The Evolution link pipe set is constructed from high-quality austenitic stainless steel. It features an arrangement of two central link pipes for the best flow of the exhaust gases from the engine. It is designed to increase power and torque and reduce overall weight, while delivering a deep and sporty sound with no unwanted drone or streaming.

When installing the Akrapovic Evolution link pipe set, remapping the ECU is mandatory in order to prevent potential “check engine light” warning signals.

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.

Downpipe w Cat (SS) was tested and developed together with Evolution Line (Titanium) system.

The high-flow downpipe is constructed using high-quality stainless steel and, once fitted to the Evolution Line exhaust, it creates a complete system from the manifold to the tailpipes that will further enhance the performance figures: both the torque and power outputs. It incorporates a sporty catalytic converter. This optional downpipe produces an enhanced sound that delivers a pure racing emotion and fantastic feedback at high revs, without unwanted drone, making it suitable for everyday use.

When installing the Akrapovic downpipe, remapping the ECU is mandatory in order to prevent potential “check engine light” warning signals.

Downpipe is optional product to the following exhaust systems:

BMW M340I (G20) without OPF: Slip-On Line (Titanium) + Link pipe set (SS) - S-BM/T/18H + E-BM/SS/7

BMW M440I (G22) without OPF: Slip-On Line (Titanium) + Link pipe set (SS) - S-BM/T/18H + E-BM/SS/7

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

Schematic new version:

ECE Type-Approval Certificate:

Installation instructions - EN:

Installation instructions - EN:

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

Performance graph:

POS HF:

STOCK EXHAUST; BMW Z4 M40I

SLIP-ON; BMW Z4 M40I

Schematic new version:

Installation instructions - EN:

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

Schematic new version:

Installation instructions - EN:

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

Performance graph:

POS HF:

STOCK EXHAUST; BMW Z4 M40I

EVOLUTION LINK PIPE SET + SLIP-ON; BMW Z4 M40I

Installation instructions - EN:

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

Performance graph:

POS HF:

Installation instructions - EN:

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