{"product_id":"btkusa-x3-x4-m-m40i-adjustable-rear-lower-control-arms","title":"BTKUSA X3\/X4 M\/M40I Adjustable Rear Lower Control Arms","description":"\u003cp\u003e\u003cstrong\u003eBTKUSA X3M\/X4M \u0026amp; X3\/X4 M40i Adjustable Rear Lower Control Arms\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMADE IN USA 🇺🇸\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFITMENT NOTICE: These Rear Lower Control Arms are designed to fit BOTH the BMW X3M\/X4M and X3\/X4 M40i platforms. The same control arms are compatible with both models.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBTKUSA BMW Adjustable Rear Lower Control Arms (RLCA)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe BTKUSA Adjustable Rear Lower Control Arms were engineered to improve rear suspension rigidity, increase alignment adjustability, and provide greater control over suspension geometry for the BMW X3M\/X4M and X3\/X4 M40i platforms.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eLowering these vehicles changes the factory suspension geometry, which can affect rear wheel alignment, tire wear, and overall handling characteristics. Our adjustable RLCA design provides the ability to fine-tune rear suspension alignment, allowing for a more precise setup for street, drag, track, or aggressively lowered applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEach arm is CNC machined from billet aluminum, providing an extremely rigid yet lightweight construction. Starting with approximately 20 LBS of aluminum, the arms are precision machined down to just 7.4 LBS for the complete pair, removing unnecessary material while maintaining structural strength where it matters most.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe adjustable design allows for greater control over rear suspension alignment compared to the factory arms. This is especially beneficial for lowered vehicles where factory adjustment may not provide the range needed to achieve the desired suspension setup.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWith the X3M\/X4M and X3\/X4 M40i being heavier, higher center-of-gravity platforms, maintaining proper rear suspension geometry and rigidity is especially important for predictable handling, stability, and consistent suspension performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDesigned with both form and function in mind, the BTKUSA Rear Lower Control Arms combine precision machining, increased adjustability, and an exceptionally rigid construction to provide a comprehensive upgrade over the factory components.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFrom the initial design and material sourcing to the final machining and finishing process, every step is proudly completed in the USA.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFeatures\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eCNC machined billet aluminum control arms\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003estainless steel sleeves for better load distribution and longevity \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAdjustable rear suspension alignment\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIncreased alignment adjustment range compared to factory\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIncreased rigidity compared to factory control arms\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLightweight construction — just 7.4 LBS per pair\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePrecision machined to minimize unnecessary weight\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDesigned for lowered street and track applications\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eImproved ability to fine-tune rear suspension geometry\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePremium anodized finish\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDesigned and manufactured in the USA 🇺🇸\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSold as a complete pair\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003etype 2 hard anodized \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eApplications\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBMW X3M \/ X4M\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBMW F97 X3M\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW F97 X3M Competition\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW F98 X4M\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW F98 X4M Competition\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eBMW X3 \/ X4 M40i\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBMW G01 X3 M40i\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBMW G02 X4 M40i\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eSold as a complete pair.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eMade in USA 🇺🇸\u003c\/span\u003e\u003c\/p\u003e","brand":"BuiltToKillUSA","offers":[{"title":"Default Title","offer_id":46509155123244,"sku":null,"price":1699.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0707\/8104\/2732\/files\/IMG-0013.jpg?v=1793032845","url":"https:\/\/builttokillusa.com\/products\/btkusa-x3-x4-m-m40i-adjustable-rear-lower-control-arms","provider":"BuiltToKillUSA","version":"1.0","type":"link"}