Akrapovic Evolution Line (Titanium) for BMW M440I (G22, G23)SO Slip OnOffering 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 Akrapovi dyno