The TEE to engine vent system is prone to break off.  Rather than replace the whole duct/pipe [08-86437] we have manufactured a replacement end to replace the stub moulded into the duct. No glue involved and can be fitted while hose still connected to airbox. A big part of the issue is that to fit that a NEW hose is a fair 2 hrs work, so in garage time, that would treble the cost! So, sort of £300 down to £12 and fitted in about 10 minutes, no grunt and groan, and no need to raise the car.