The BOLOJAU 50cc open intake manifold is a perfect addition to any 50cc 2-stroke engine that needs an upgrade in performance and engine sound. This high-quality product is designed specifically for various Piaggio NRG ZIP TPH, Gilera Runner, Vespa ET2, Aprilia, and Derbi scooters, as well as for carburetors ranging from 12 to 21 mm. Its open design allows for better airflow, resulting in a significant boost in power and acceleration. Moreover, the manifold offers a rich, deep tone that complements the classic sound of these scooters. Constructed of durable rubber, it ensures a long-lasting and reliable installation. This product is an excellent choice for anyone seeking to enhance the performance and enjoyment of their 50cc 2-stroke engine.