This is an optional part as an upgrade to the Evolution Line (Titanium) exhaust for further tuning. The downpipes are high-quality stainless steel, containing sporty 200 cpsi catalytic converters, insulated to prevent overheating any parts around them. The stainless-steel link pipes have custom-made flex tubes, with insulation where they connect to the downpipes. When fitted with the Evolution Line (Titanium), the entire configuration offers a unique acoustic experience. It is perfectly tuned by the sound engineers to produce pure V8 aural performance because the two areas of the exhaust work in harmony to create a high-frequency racing tone in the upper rev range and a deep and torquey V8 rumble in lower revs, with the comfort mode retained for those more sedate moments.