{"product_id":"millway-bmw-m-sport-rear-stainless-steel-brake-caliper-pistons-90523-44-4","title":"Millway Motorsport BMW M-Sport Rear Stainless Steel Brake Caliper Pistons | 90523-44-4","description":"\u003cp\u003e\u003cstrong\u003eMillway Motorsport 90523-44-4 stainless steel rear brake caliper pistons\u003c\/strong\u003e are a track-focused replacement for the factory aluminium pistons used in a wide range of BMW M Sport and M-car rear Brembo calipers.\u003c\/p\u003e\u003cp\u003eRepeated high-temperature track use can place considerable thermal load on the standard aluminium pistons. Millway machines these replacements from diamond-polished stainless steel and incorporates an air-gap design to reduce heat transfer between the brake pad and piston.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDiamond-polished stainless steel construction\u003c\/li\u003e\n\u003cli\u003eDesigned for high-temperature track use\u003c\/li\u003e\n\u003cli\u003eAir-gap design helps reduce heat transfer from pad to piston\u003c\/li\u003e\n\u003cli\u003eSet of four rear caliper pistons\u003c\/li\u003e\n\u003cli\u003eDirect upgrade for compatible BMW\/Brembo rear brake calipers\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eBMW Applications\u003c\/h2\u003e\u003cp\u003eCompatible with rear M Sport\/Brembo brake calipers used on applications including BMW F20\/F21 M135i and M140i, F22 M235i and M240i, F87 M2, F87 M2 Competition, F80 M3 and F82\/F83 M4, plus other compatible BMW models using the same rear caliper.\u003c\/p\u003e\u003ch2\u003eImportant Track-Use Note\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eThese pistons are intended for track-focused use and do not provide a provision for the original dust seals.\u003c\/strong\u003e They are therefore not intended as an OE-style road replacement where maintaining the factory dust-seal arrangement is required.\u003c\/p\u003e\u003cp\u003eProfessional brake-system installation is strongly recommended.\u003c\/p\u003e\u003cp\u003eBrowse the complete \u003ca href=\"\/collections\/millway-motorsport\"\u003eMillway Motorsport range\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eMillway part number:\u003c\/strong\u003e 90523-44-4.\u003c\/p\u003e","brand":"Millway Motorsport","offers":[{"title":"Default Title","offer_id":65697479983453,"sku":"MW90523-44-4","price":315.8,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0799\/0411\/2989\/files\/millway-stainless-steel-brake-pistons-90523-44-1-a-1080x1080.jpg?v=1787747476","url":"https:\/\/nineteen72performance.co.uk\/products\/millway-bmw-m-sport-rear-stainless-steel-brake-caliper-pistons-90523-44-4","provider":"Nineteen72 Performance","version":"1.0","type":"link"}