BMW Inlet Manifold Swirl Flap Removal Kit E87 E90 F20 F30 F07 F32 E60 F10 E84 11617807991

BMW introduced swirl flaps into all of their diesel engines from 1998. The swirl flaps are designed to close at lower speeds to improve torque and then to open at higher revs for an improved fuel to air ratio.

However, over the years soot builds up on these moving parts and within the intake ports. Images can be seen across the internet showing these manifolds completed coked up with carbon deposits, putting excess stress on the swirl flap components.

Not only does this restrict air flow and performance, in some instances it has led to failure of the swirl flap components and these parts entering the engine.

This part is designed to block the hole created by the removal of the swirl flaps.

The unique bung with its double Viton seal (Viton is the correct material to use here to prevent future issues) perfectly seals the manifold after removing the swirl flaps stopping any boost leaks.

The swirl flap actuating motor is left connected and running as normal so will not trigger any fault codes. Removal of these parts does not affect vehicle performance and in some instances performance is improved as these components (and lumps of carbon build up attached thereto) are removed.

This kit also comes with a aluminium spacer. This is essential as in some instances a small piece of plastic is missing from the actuator motor.