{"product_id":"bc-racing-er-series-ford-focus-mk2-2004-2011-inc-st","title":"BC Racing ER series - Ford Focus MK2 (2004-2011) (Inc ST)","description":"\u003ch3 data-pm-slice=\"1 1 []\"\u003e\u003cspan\u003eBC Racing ER Series Coilovers – Ford Focus MK2 (2004–2011) Including ST\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eUpgrade the suspension of your Ford Focus Mk2 with the BC Racing ER Series coilover kit, designed for drivers wanting a more advanced setup for fast-road, track day and motorsport use.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSuitable for selected Ford Focus Mk2 models including the Focus ST, the ER Series adds external reservoirs to BC Racing’s monotube damper design, increasing oil capacity and helping improve temperature control during sustained hard use.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWith 30-way adjustable damping, independent ride-height adjustment and multiple spring-rate options, the ER Series is a strong choice for more demanding performance builds where consistency and control are priorities.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eExternal Reservoir Damper Design\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe defining feature of the BC Racing ER Series is its external reservoir configuration.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBy increasing damper oil capacity and helping manage heat more effectively, the ER Series is better suited to repeated high-load driving where damper temperatures can rise significantly.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis makes it particularly useful for track-day, time attack and motorsport applications where consistent damping performance over longer sessions is important.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eKey features:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eER Series monotube damper design\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eExternal reservoirs for increased oil capacity\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eImproved temperature control under sustained hard use\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e30-way adjustable damping\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eIndependent ride-height adjustment\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eAdjustable spring preload\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eImproved body control and chassis response\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eRebuildable design\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eReplacement components available\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eMultiple spring-rate configurations available\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eCustom specification options available\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eSuitable for selected Ford Focus Mk2 models including ST\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eSpring Rate Options\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eAvailable spring-rate configurations include:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e9\/6kg.mm – recommended spring rate for a balance of comfort and performance\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAlternative options include:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e12\/14kg.mm – significantly firmer, track-focused setup\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e10\/12kg.mm – firmer performance setup for more demanding circuit use\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eThe recommended 9\/6kg.mm configuration provides the most balanced option for fast-road and track use, offering increased chassis support and response while retaining more compliance than the higher-rate alternatives.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe 10\/12kg.mm and 12\/14kg.mm configurations are aimed at much more focused track and motorsport applications where reduced body movement, increased support and consistency under higher loads are the main priorities.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIf you are unsure which spring rate is most suitable for your Focus, please contact us before ordering.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eAdjustable Ride Height \u0026amp; Damping\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eRide height can be adjusted independently of spring preload, helping retain usable damper travel when lowering the vehicle.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe 30-way damping adjustment allows the suspension response to be fine-tuned according to road conditions, driver preference and intended use, from fast-road driving through to more demanding circuit work.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eVehicle Fitment\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eDesigned for selected:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFord Focus Mk2\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFord Focus ST Mk2 \/ ST225\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e2004–2011\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eExact compatibility can vary depending on model, engine and suspension specification.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eProduct Image \u0026amp; Specification Note\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eProduct images are for illustration purposes only and may not show the exact specification supplied for every vehicle application.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBC Racing kits can vary depending on vehicle, spring rate, top mount configuration and other specification options. If you have any specific requirements, such as upgraded or alternative top mounts, spring rates, reservoir configuration or ride-height preferences, please contact us before ordering so we can confirm the most suitable setup for your vehicle.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eFast Road, Track \u0026amp; Motorsport Performance\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe BC Racing ER Series is particularly well suited to drivers wanting greater consistency and thermal control than a conventional non-reservoir coilover setup.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe recommended 9\/6kg.mm spring rate provides a strong balance for fast-road and track use, while the higher-rate options allow the same platform to be configured for significantly more focused circuit and motorsport applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eProfessional Installation Recommended\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eProfessional installation is recommended.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eA full four-wheel alignment should also be carried out after installation and once the final ride height has been set to ensure correct geometry, tyre wear and handling characteristics.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eExplore More\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e\u003ca href=\"https:\/\/therossocorsacollective.com\/collections\/focus-st-mk2\"\u003eFord Focus Mk2\u003c\/a\u003e – Explore suspension, braking and performance upgrades for the 2004–2011 Ford Focus platform.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003ca href=\"https:\/\/therossocorsacollective.com\/collections\/bc-racing\"\u003eBC Racing\u003c\/a\u003e – Browse adjustable coilover suspension systems for fast-road, track and motorsport use.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eS\u003ca href=\"https:\/\/therossocorsacollective.com\/collections\/suspension\"\u003euspension \u0026amp; Handling\u003c\/a\u003e – Explore coilovers, suspension arms, bushes and chassis upgrades.\u003c\/span\u003e\u003c\/p\u003e","brand":"BC Racing","offers":[{"title":"ER - 9\/6kg.mm","offer_id":55484485566801,"sku":"0008034","price":1574.1,"currency_code":"GBP","in_stock":true},{"title":"ER - 12\/14kg.mm","offer_id":55484485599569,"sku":"0024923","price":1574.1,"currency_code":"GBP","in_stock":true},{"title":"ER - 10\/12kg.mm","offer_id":55484485632337,"sku":"0025405","price":1574.1,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0968\/6371\/5665\/files\/BC-Racing-ER-Series-Volkswagen-Golf-MK7-Variant-FWD-_Strut-54.5mm_-_2013-2019_-BC-Racing-8145257.png?v=1762951667","url":"https:\/\/therossocorsacollective.com\/products\/bc-racing-er-series-ford-focus-mk2-2004-2011-inc-st","provider":"The Rosso Corsa Collective","version":"1.0","type":"link"}