BBR Tuning High Performance 2-Stroke Motorized Bike Expansion Chamber Exhaust- Gas Bike Performance Muffler Upgrade (Chrome) BOOSTS PERFORMANCE: The BBR Tuning High Performance Expansion Chamber is the best performing exhaust for 2-stroke motorized bikes. It's extra large tuned chamber will largely increase the power band of the engine from mid to top end while drastically boosting torque, acceleration and top speed. The exhaust has no baffle restricting it's flow and performance. SLEEK DESIGN: This exhaust is designed to fit in place of the stock and swing directly under your bike. It's commonly know as the banana muffler or pipe from its shape. The shape was engineered to have your engine running at it's peak performance while keeping your bike looking great. EASY INSTALLATION: Just unbolt your old exhaust and replace it with your new BBR Tuning Expansion chamber. It's that simple and just takes a few minutes. UNIVERSAL FIT: This 2-Stroke exhaust is designed to work with any 40mm stud spacing exhaust port common on motorized bicycles such as 48cc, 60cc, 66cc and 80cc. INCLUDED COMPONENTS: 1x BBR Tuning Expansion Chamber Motorized Bike Exhaust