The 997 TT may be the best 911 turbo ever built. Developing a proper exhaust can not be taken lightly. The RSC approach was simple. Develop a system that makes HP, Saves Weight and Sounds amazing.. The RSC Titan system delivers on all counts. The sport system utilizes special 200 Cell catalysts joined with RSC propietary muffler, This combination has produced a system that many have hailed as the best built, best sounding system for the worlds best 911 yet. +33HP Increased Throttle response Unique Sound No Interior Resonance or Vibration RSC 25 Year guarantee 30 Lbs Lighter than the factory unit