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The MMR Performance 90mm billet coolant expansion cap for BMWs has been designed from the ground up in the UK, engineered from a solid billet of aluminium.
Each cap was designed to directly replace the OE cap, not merely a cover stuck in place. Fitment is for models with the matching OE (17 11 7 639 021) part number.
All MMR coolant caps arrive pre-sealed and pre-installed with an OE spec valve and internal spring. No need to remove the valve assembly from your OE cap. A true plug and play solution.
Ships within 48 hours · Estimated delivery Aug 28 - Sep 2
US$40
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