The Evolution systems for the GTI retain all the exclusivity of the titanium Slip-On, including stunning carbon fibre tailpipes, and display further potential through additional link and down pipes made from austenitic stainless steel for even greater strength and enhanced temperature and corrosion resistance. With its sports catalytic converter, bigger tubes, and optimized gas flow and back pressure, Evolution unleashes additional power and improves the torque and responsiveness of the GTI's engine.