Bourne HPP K-Series High Performance Inlet Valve Set Optimize the airflow and efficiency of your cylinder head with this premium inlet valve set, developed by Bourne HPP. Designed as a superior replacement for standard components, these valves are engineered to withstand the mechanical stress of high-RPM K20 and K24 engines while maintaining excellent seal integrity. Manufactured from high-grade EN52 steel, these valves offer robust durability for high-performance applications. The addition of a Pulse Plasma Nitrided coating significantly increases surface hardness and reduces friction, while the super polished finish ensures smoother airflow into the combustion chamber, making them an ideal upgrade for both turbocharged and high-compression naturally aspirated setups. Key Specifications Fitment: K20 / K24 (Inlet Side) Material: EN52 Steel Finish: Super Polished Coating: Pulse Plasma Nitrided Dish Capacity: 0.31cc Status: Performance upgrade Performance Pedigree These valves have been selected for their ability to deliver consistent performance under racing conditions. The Pulse Plasma Nitriding process not only improves wear resistance on the valve stem but also helps prevent micro-welding and scuffing in the guides. Combined with the super polished finish, these valves minimize flow restriction, ensuring your engine breathes freely at the limit. Kit Contents 8x Bourne HPP Inlet Valves Installation Note: Please note that these are sold in a pack of 8, which covers the inlet side of a standard K-Series cylinder head. When installing, we recommend checking valve-to-guide clearances and ensuring a proper valve seat seal. We recommend professional installation and machining if required.
