Classic Mini Manifold Downpipe Nut For Injection Cars SPi & MPi 

Replace these nuts when you remove your exhaust from the manifold downpipe and check the studs TD108051A also as they all seem to corrode or wear. These nuts should be replaced as they have a crimped thread to lock on the stud when fitted. 

Metric M8 thread. 

Part number for reference: FX108047