A factor to consider when choosing an exhaust system is the material used to make the system. Most stock exhaust systems are made of mild steel which means that they deteriorate over time. The better aftermarket systems are made using aluminized steel or stainless steel. Aluminized steel offers slightly better longevity than stock systems, while stainless systems are designed to last much longer. Here you’ll find aftermarket systems that look stock, but still provide performance gains. If you have any questions on choosing the right exhaust system or your 996 GT2 (2001-2005) Porsche let us know!