For BMW's suffer a common issue with the swirl flaps in the inlet manifold. The Screws holding the butterflies can come loose can cause severe damage to your engine. It's a well known issue that has been covered many times on the for BMW forums & magazines. The easiest way to prevent this damage occurring to your engine is to replace these swirl flap bungs with these.

Features:
4 pcs 22mm bungs, one plate for each cylinder.
The bungs are machined from high grade aluminium using state of the art CNC technology.
The O rings are supplied with the bungs.
Easy to install. Directly swap with your existing swirl flaps, simply push in and screw in place.
There will be no difference in performance from you vehicle, you may even notice an improvement if your swirl flaps have deteriorated.

Specifications:
Material: Metal
Color: Silver
Diameter: 22mm
Quantity: 4
Package Size: 10 * 7 * 2cm / 4 * 2.8 * 0.8in
Package Weight: 75g / 2.6oz

Fitment:
For BMW engine codes and models as following:

M47N/M47TU/M47TUD20
E46 320d 2001-2005, E83 X3 2.0d (up to end of 2006)

M47TU2D20 updated in 2004 to M47TU2D20
E60/E61 520d, E87 120d, E90/E91 320d, E83 X3 2.0d - end of 2006 onwards

Previous M57 - 2000 onwards M57D25
2000-2003 E39 525d automatic transmission only.

M57N/M57TU - 2004 onwards M57TUD25
E60/E61 525d

M57/M57D29 - 1998 onwards M57D30
E39 530d automatic transmission only
E46 330d/330xd automatic transmission only
E38 730d automatic transmission only
E53 X5 3.0d, E38 730d, E39 530d

M57N/M57TU - 2002 onwards M57TUD30
E46 330d/330Cd/330xd
E83 X3 3.0d
E53 X5 3.0d
E60/E61 530d/530xd
E65 730d
E60/E61 535d

M57TU2D30 M57TU2D30 - 2007 onwards, facelifted E60 and E61
M57TU2D30-UL M57TU2D30-OL M57TU2D30-TOP
E90/E91/E92 325d
E60/E61 525d/525xd E65 730d
E90/E91 325d
E90/E91 330d/330xd
E60/E61
For BMW E70
For BMW E71
E60/E61 535d
E70 X5 3.0sd
E71 X6 xDrive35d
E83 X3 3.0sd
E90/E91 335d

Package List:  K4351-1
4 * Swirl Flap Bung