MMX Performance 60mm Billet Coolant Cap for BMW MMR03-1503 MMX M300 With the internal material also

With the internal material also mirrored on the outside

And isn't that what it's all about

our PCM is so much more than a 'tuning box'

For the final CEUK touch

This is harmless and does not affect performance

MMX Performance 60mm Billet Coolant Cap for BMW MMR03-1503 MMX M300 With the internal material alsoIt's meticulously machined from this billet with the latest CNC 5 axis technology, before being polished, then gloss anodised to stay beautiful year after year. 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. It has been designed to instantly give your BMW an under bonnet boost in the aesthetic department, finished