Akrapovic Evolution Line Exhaust System - Titanium318908676 Product Description Constructed from lightweight, high grade titanium alloys Saving of 19. 7% (0. 8 kg) over the standard stock exhaust Added strength created by the design to provide enhanced resilience under the most demanding conditions Offering an increased response through the entire rev range, the Evolution Line (Titanium) has a new profiled surface, which influences the deep, full sound, and an integrated resonance chamber for optimum