Slip On Line Titanium I BMW Z4 M40i G29

The Akrapovič Slip On Line Titanium Exhaust is a premium performance upgrade for the BMW Z4 M40i G29, combining exceptional craftsmanship, lightweight titanium construction and a richer, more engaging exhaust character.

Manufactured to exacting specifications from high grade titanium, with selected components cast within Akrapovič’s own in house foundry, the system demonstrates the level of engineering and finish for which Akrapovič is renowned. Every section is designed around strength, durability, low weight and precise fitment, creating an exhaust that feels completely at home on a high performance BMW.

The extensive use of titanium significantly reduces exhaust system weight compared with the original equipment while also improving exhaust gas flow. The system has been developed to optimise power and torque delivery across the rev range, complementing the strong performance characteristics of the B58 turbocharged straight six engine.

A single muffler layout keeps the construction compact and efficient, while four beautifully finished, handcrafted carbon fibre round tailpipes give the rear of the Z4 a considerably more purposeful appearance. The exhaust follows the lines of the G29 closely, producing an installation that looks integrated with the original design rather than simply added to it.

Sound development is an equally important part of the system. As engine speed rises, the B58 develops a stronger, more animated and sporting exhaust note, adding considerably more character under acceleration. In the quieter operating modes, the system retains the refinement required for relaxed road driving, making it particularly well suited to cruising with the roof lowered.

The Slip On Line itself carries ECE type approval when fitted to eligible vehicles. Fitment and EC type approval apply to vehicles equipped with the B58B30C engine, and ECE type approval is only valid for cars equipped with the factory petrol particulate filter, commonly referred to as the OPF or GPF.

Installation requires the original BMW exhaust system to be cut, so the Akrapovič installation instructions should be read carefully before work begins. Correct measurement, alignment and installation are important to ensure the exhaust sits accurately beneath the vehicle and the carbon fibre tailpipes are positioned correctly within the rear bumper.

For owners looking for an exhaust system that matches the quality and character of the Z4 M40i, the Akrapovič Slip On Line delivers an exceptional combination of titanium construction, weight reduction, performance, sound and craftsmanship.