Chrome Exhaust Tips for Porsche 911 996 (1999-2001)Corrosion Resistant Quad Exhaust Tips for 1999 2001 Porsche 911 (M96 996) What it Does: Replaces the standard single exit factory tips with a T304 stainless steel quad fused oval design to enhance rear end aesthetics and improve thermal durability at the exhaust exit. The Stock 911 Exhaust Weakness The factory exhaust tips on the 1999 2001 Porsche 911 (996. 1) are susceptible to surface oxidation and pitting due to the lower grade stainless or chrome