1Application: The exhaust muffler pipe is applicable for 49?80cc 2?stroke Motorized Bicycle Bike, replacement for Coleman CT200U Trail Mini Bike. 2Important Parameter: The mounting hole size is 40mm/1.57in (center to center), the interface size is 18mm/0.71in, the exhaust port size is M10. 3High Performance: The engine exhaust pipe can help you effectively reduce noise during driving, ensure smooth gas exhausting with high performance. 4Durable Material: The exhaust outlet pipe is made of high strength iron material, which has a glossy surface, wear resistant, impact proof and durable. 5Easy Installation: Easy to install, no modification, cutting, or drilling required. It adopts original standard, which is a perfect replacement and can perfectly match.