This racing exhaust system consists of 2 parts.
1- Expansion chamber
Expansion chamber will give better power and response at low end (low-mid RPM) and also a power improvement.
2- Carbon muffler/silencer
The New Bud racing carbon muffler is assembled with lightweight carbon body and end cap. Metal muffler parts are stainless. Made for better durability and an easier access for repacking without bolts.