Features: 1.Fitment: 18mm inlet manifold intake pipe is perfect replacement for Z50 Z50A Z50R Mini Trial Monkey Bike and replacement for some 50cc 70cc 90cc Chinese Pit Bike ATV Go Karts. Please confirm whether it is suitable for your model before perchasing in case of any trouble. 2.Easy Installation: The installation procedure for the intake manifold of the carburetor is simple, without the need for special tools or professional installation personnel. It can be installed independently and can be completed in a short time. 3.Improving Efficiency: The reasonably designed curve of the 18mm aluminum carburetor intake manifold makes the intake flow more uniform and improves intake efficiency. 4.Durable: The 18mm aluminum carburetor intake manifold is made of cast aluminum material, which is not easy to rust and can withstand any harsh weather. It has a long service life and does not require frequent replacement. 5.Perfect Replacement: The 18mm aluminum carburetor intake manifold can directly replace old or damaged parts, improving the engine's intake efficiency, performance, and stability, making it a perfect replacement. Specification: Item Type:18mm Inlet Manifold Intake Pipe_x000D_ Inlet Diameter: 18mm_x000D_ Outlet Diameter: 18mm_x000D_ Fitment:_x000D_ Replacement For Z50 Z50A Z50R Mini Trial Monkey Bike_x000D_ Replacement For Some 50cc 70cc 90cc Chinese Pit Bike ATV Go Karts