{"product_id":"shop-creeper","title":"Shop Creeper","description":"The MMX Performance BMW Billet Coolant Expansion Cap offers a significant upgrade over the factory plastic unit, addressing potential degradation from heat cycles and sealing issues. This cap is a true OE replacement, machined from a solid block of 6061 aerospace-grade aluminum for superior strength and long-term reliability. Its robust construction is enhanced by advanced 5-axis CNC machining, ensuring a precise fit and finish.\n\nThe cap comes complete with pre-installed OE-spec internals, including a pressure valve, internal spring, and a Viton O-ring seal, eliminating the need to transfer components from your old cap. This plug-and-play installation, combined with an improved grip design for easier handling, makes servicing your cooling system more confident and straightforward. The gloss black anodized finish not only provides excellent corrosion resistance but also adds a refined, OEM+ aesthetic to your engine bay.\n\nAvailable in both 60mm (replacing OE part number 17117639024) and 90mm (replacing OE part number 17117639021) fitments, it's crucial to confirm the correct size or OE part number on your existing cap before purchase. This billet expansion cap is designed and tested in the United Kingdom and comes with a 1-year manufacturer warranty.","brand":"MMX Performance","offers":[{"title":"Default Title","offer_id":52689258774840,"sku":"MMR03-1502","price":108.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687391324.webp?v=1784904207","url":"https:\/\/store.motormia.co\/products\/shop-creeper","provider":"MOTORMIA","version":"1.0","type":"link"}