The Ciloyu Co-inlet GX3903 Intake Pipe Inlet Manifold Adapter Kit is designed to fit Predator 301cc and 420cc engines. This adapter kit helps in converting the single inlet manifold to a dual inlet manifold, which can improve engine performance by providing better fuel distribution and air intake Durable Material: The improved intake manifold is made from high quality materials and offers excellent durability, high temperature resistance, long life and easy installation Note: There is an intake hole on top of the intake pipe that allows the intake pipe to do more work, you can choose whether to use this intake hole or not according to your needs (please see the schematic) Compatibility: Predator 420 cc(13 hp),301 cc(8 hp)Engine / GX340(11 hp), GX390(13 hp), GX270(9 hp) Engine Durable Material: The improved intake manifold is made from high quality materials and offers excellent durability, high temperature resistance, long life and easy installation. 62mm Air Filter Adapter Stage 1 Kit For Predator 301cc 420cc GX340 GX390 13hp 15hp OHV Clone Engine Mini Bike Go Kart Golf Cart Lawnmower Water Pump Pres A305ee0c De48 43b9 8e22 380029012b47.0f31085b6a6bd7e5f747c9e2045f0e38 Predator Engines: 301cc (8HP), 420cc (13HP), 459cc. High-Performance Intake Manifold Kit for 301-459cc Engines - Compatible with Predator, Honda GX-Series & VM34 Carburetors. Its design directly impacts throttle response, torque, and overall power output Function of 301cc Intake Manifold: Convey the combustible mixture from the carburetor to the engine, its efficiency directly affects the engine efficiency. Product details Fitment: Intake Manifold Kit for Predator 301 cc 420 cc 459 cc GX340 GX390 GX270 VM34 Carburetor 11 hp 13 hp Engine Go Kart Cart Mini bike Lawnmower Water Pump Pressure Washer Parts. Caalii Air Filter Adapter Jet Kit for Predator 301cc 420cc The inner wall of the intake manifold is designed with a smooth surface and good sealing, providing the best airflow