MMX Performance BMW billet 90mm coolant expansion cap

MMR 

The MMR Performance 90mm billet coolant expansion cap for BMWs has been designed from the ground up in the UK, from a solid piece of billet aluminium.

Each cap was designed to directly replace the OE cap, not merely stuck in place. Fitment is for models with the matching OE (17 11 7 639 021) part number.

Feature heavy.

• Engineered in the UK
• Crafted from 6061 aerospace-grade aluminium
• Full OE cap replacement
• 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

Part Number: MMR03-1502