The runner flaps within the inlet manifold limit airflow and performance.
The factory fitted inlet manifolds on EA113 engines have runner flaps fitted within. Much like throttle body flaps these open and close to adjust airflow. These ultimately restrict airflow, even when fully open airflow is restricted. This becomes an issue the more the vehicle is tuned. Carbon can also build up on these moving parts providing more restriction and can in some cases cause failure of the moving parts within the manifold.
Remove the runner flaps completely from the manifold using our kit. Our precision engineered CNC billet aluminium parts allow you to remove the runner flaps. Our parts replace the runner bearing blocks and the crank arm; sealing the manifold and vastly improving airflow. Ideal for stock vehicles to improve airflow and prevent carbon build up- even better for tuned engines. Customers with tuned engines have noted quicker throttle response, less turbo lag, improved torque and BHP gains when deleting the runner flaps.