It'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 in a deep gloss black anodised finish.
Never again will you worry whether you tightened your expansion cap fully, as the cap contains complete OE replacement internals. The carefully considered design gives ample surface grip area for your fingers, making installation and filling your coolant that little bit easier.
Designed and engineered in the UK
Crafted from 6061 aerospace-grade aluminium
Full OE cap replacement, not just a cover
Sophisticated internal springing and bleed off
Anodised in MMR signature gloss black
Joins existing range of MMR billet caps
Pre-installed factory spec Viton O-Ring
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.
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 in a deep gloss black anodised finish.
Never again will you worry whether you tightened your expansion cap fully, as the cap contains complete OE replacement internals. The carefully considered design gives ample surface grip area for your fingers, making installation and filling your coolant that little bit easier.
Designed and engineered in the UK
Crafted from 6061 aerospace-grade aluminium
Full OE cap replacement, not just a cover
Sophisticated internal springing and bleed off
Anodised in MMR signature gloss black
Joins existing range of MMR billet caps
Pre-installed factory spec Viton O-Ring
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.
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Main materialAluminum
