{"product_id":"bilstein-19-227641-bmw-f12-f13-b4-oe-replacement-rear-shock-absorber-inc-640i-650i-640d-640i-xdrive-650i-xdrive-640d-xdrive","title":"F12 F13 BMW 6 Series rear shock absorber Bilstein B4 19-227641","description":"\u003cp\u003eBilstein B4 19-227641 rear shock for F12 and F13 chassis - the no-nonsense, twin-tube gas-pressure damper that sharpens up a softening rear axle without stepping into coilover territory.\u003c\/p\u003e\u003cp\u003eWorks as a fast-road or daily-driver upgrade on all F12 Coupe, F13 Convertible and F06 Gran Coupe variants: 640i, 640d, 650i, 650i xDrive. Not for M6 (F13) - that’s N54\/N55-based but uses different mounting geometry and needs F13 M6-specific dampers.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits\u003c\/strong\u003e: F12, F13, F06 (non-M6 only); \u003cstrong\u003enot for E63\/E64 or G32\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage 1 friendly\u003c\/strong\u003e - pairs cleanly with mild spring upgrades or decat + tune combos\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrack-day capable\u003c\/strong\u003e if your use case is occasional circuit work and you’re not chasing lap times\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM plus\u003c\/strong\u003e, not OEM replacement - stiffer valving than stock, same mounting points, zero coding\u003c\/li\u003e\n\u003cli\u003eSearch terms this answers: \u003cstrong\u003eBilstein 19-227641, F13 rear damper, F12 rear shock, 640d fast road suspension, 650i xDrive track day rear shock, N55 F13 rear damper\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Bilstein","offers":[{"title":"Default Title","offer_id":54381886112087,"sku":"BILSTEIN-19-227641","price":152.86,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1038\/4575\/7271\/files\/1SqfCS5tJNRZ0d4bzcwmyMi6GrrAQd30O.jpg?v=1787136953","url":"https:\/\/cuzracecars.com\/products\/bilstein-19-227641-bmw-f12-f13-b4-oe-replacement-rear-shock-absorber-inc-640i-650i-640d-640i-xdrive-650i-xdrive-640d-xdrive","provider":"Cuz Race Cars","version":"1.0","type":"link"}