BBR Tuning Flex Fit Poo Poo 2-Stroke Motorized Bicycle Engine Motocross Expansion Chamber Muffler &ndash; Gas Bike High Performance Upgrade BOOST PERFORMANCE: The BBR Tuning Flex Fit Poo Poo Expansion Chamber exhaust is designed to increase your 2 stroke engines performance from low to high end. With the expansion chamber you can expect your engine to provide a stronger mid range power band resulting in more torque and top speed. FLEXIBLE FITMENT: This exhaust was designed with those tricky builds in mind that won't fit most standard exhaust. Featuring a long flexible hose, you get to decide how your exhaust is routed on your bike making your builds possibilities endless. EASY INSTALLATION: Installing this exhaust is a breeze just unbolt your existing muffler, replace your gasket if needed and bolt on your new BBR Tuning Flex Fit Poo Poo Exhaust and mount the muffler and tubing however you like. It's that easy! UNIVERSAL FITMENT: Designed to work with most standard 48cc, 60cc, 66cc and 80cc 2-stroke bicycle engine kits. PACKAGE INCLUDES: 1x BBR Tuning Flex Fit Poo Poo 2-Stroke Motorized Bike Expansion Chamber Exhaust