The MMR Performance billet coolant expansion cap for F-Series MINIs has been designed from the ground up in the UK, engineered from a solid billet of aluminium.
The cap is designed to directly replace the OE cap, not merely a cover stuck in place. Fitment is for models with the matching OE (17 11 7 639 024) part number.
This part also goes by the following cross reference.
Cross Reference Part Number: