General description The Kit 4 caps 22mm air intake gallery cancellation valve for BMW M47 engine is designed to replace the existing swirl flaps in your vehicle. This kit includes an intake manifold gasket kit and features a high-quality aluminum piston manufactured using advanced CNC technology. The piston is equipped with an O-ring seal for optimal performance and reliability. Technical specifications Material: High-quality aluminum Piston type: CNC manufactured Seal type: O-ring seal Compatibility: BMW E46 (320D), BMW E87 (120D), BMW E60/E61 (520D), BMW E83 (2.0D), BMW E90/E91/E92/E93 (320D) Installation Easy to install by pushing the piston into place and tightening it. Usage No performance difference is expected after installation; potential improvement if existing swirl flaps are deteriorated. The ECU will not register the removal of the flaps, ensuring no error codes or changes in engine parameters. Other information All plugs are equipped with high-temperature resistant