Brand new PERFORMANCE DUAL/TWIN EXHAUST MUFFLER  for 47cc 49cc 2 Stroke Pocket bike, Super Bike, Mini Pocket Bike, Pocket Rocket

Features:

• Higher top speed
• Longer and wider expansion chamber to provide less back-pressure
• Build-in silencer gives your bike a more tuned exhaust note, more quiet 
• Double-bent header, less power lost