{"product_id":"qa1-coilover-4-link-r124-150s","title":"QA1 Coilover 4 Link R124-150S","description":"Transform your 1967–1970 Mustang’s rear suspension with QA1’s complete bolt-in 4-link system, featuring a custom QA1 9-inch rear housing. This all-inclusive kit delivers modern handling, improved traction, and the durability to handle serious horsepower - all while retaining a clean, factory-style fit. Perfect for restomod builds and performance street cars, this setup eliminates the compromises of leaf-spring suspension for good.MODERN HANDLING FOR YOUR CLASSIC MUSTANG QA1’s triangulated 4-link system replaces leaf springs with a geometry-optimized setup that improves traction, stability, and ride quality. By eliminating axle wrap and keeping pinion angle consistent under load, your Mustang will launch harder, corner flatter, and drive smoother - whether you’re cruising or carving corners. SINGLE ADJUSTABLE COILOVERS This system includes QA1’s single adjustable shocks, offering 18 clicks of rebound and compression adjustment together. A single knob makes it easy to fine-tune comfort and performance, giving you complete control over how your Mustang rides and handles. BUILT TO HANDLE BIG POWER QA1’s fabricated 9-inch housing is designed to take abuse. Fully formed trailing arm brackets minimize flex, while 3” OD, ¼” wall axle tubes and 31-spline alloy axles provide the strength to handle up to 650 HP (housing rated to 800 HP). The result is a rigid, predictable suspension that’s ready for modern horsepower levels. RIDE HEIGHT ADJUSTABILITY Easily adjust ride height from factory level to 3” lower. Fine-tune your stance and handling without compromising geometry, tire clearance, or comfort - all with simple, tool-free adjusters. EASY INSTALLATION The QA1 4-link kit is designed for self-fixturing weld-in installation, ensuring accurate alignment with minimal fabrication. The included QA1 9” housing bolts in cleanly, providing a precise fit with QA1’s brackets and coilovers.\r\n\u003cul\u003e\t\u003cli\u003eApplication-specific fit for 1967–1970 Ford Mustangs\u003c\/li\u003e\r\n\t\u003cli\u003eIncludes drain plug, fill plug, vent port, and jack pad for easy serviceability\u003c\/li\u003e\r\n\t\u003cli\u003eWeld-in installation with self-fixturing brackets for perfect geometry\u003c\/li\u003e\r\n\t\u003cli\u003eComplete system includes 9” rear housing, triangulated 4-link, and coilover shocks\u003c\/li\u003e\r\n\t\u003cli\u003eSingle adjustable shocks with 18 clicks of rebound\/compression control\u003c\/li\u003e\r\n\t\u003cli\u003eAdjustable ride height: factory to –3”\u003c\/li\u003e\r\n\t\u003cli\u003eEliminates axle wrap and wheel hop for improved traction and control\u003c\/li\u003e\r\n\t\u003cli\u003eHeavy-duty fabricated 9” housing with 3” OD, ¼” wall axle tubes\u003c\/li\u003e\r\n\t\u003cli\u003e31-spline 1541H alloy axles rated to 650 HP (housing rated to 800 HP)\u003c\/li\u003e\r\n\t\u003cli\u003eBig Ford “New Style Torino” flanges (2.5” offset) for easy brake compatibility\u003c\/li\u003e\r\n\t\u003cli\u003e5x4.5” bolt pattern fits most aftermarket Mustang wheels\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\t\t\t\t\u003cdiv class=\"product__accordion accordion\"\u003e\n\t\t\t\t\u003cdetails\u003e\n\t\t\t\t  \u003csummary aria-expanded=\"false\"\u003e\n\t\t\t\t\t\u003cdiv class=\"summary__title\"\u003e\u003ch2 class=\"h4 accordion__title\"\u003eAttributes\u003c\/h2\u003e\u003c\/div\u003e\n\u003cspan class=\"icon-caret\"\u003e\u003c\/span\u003e\t\t\t\t\t\n\t\t\t\t  \u003c\/summary\u003e\n\t\t\t\t  \u003cdiv class=\"accordion__content\"\u003e\u003cul\u003e\r\n\u003cli\u003e\n\u003cb\u003eBrand Name: \u003c\/b\u003eQA1\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eGTIN: \u003c\/b\u003e00806990234667\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eAir Adjustable: \u003c\/b\u003eNo\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eBushing Color: \u003c\/b\u003eBlack\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eBushing Material: \u003c\/b\u003ePolyurethane\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eCoil Spring Color: \u003c\/b\u003eSilver\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eCoil Spring Compressed Length: \u003c\/b\u003e8\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eCoil Spring Insulator(s) Included: \u003c\/b\u003eNo\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eCoil Spring Material: \u003c\/b\u003eChrome Silicon Alloy\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eCoil Spring Relaxed Length: \u003c\/b\u003e12\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eGrade Type: \u003c\/b\u003ePerformance\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eManufacturer Part Number: \u003c\/b\u003eR124-150S\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eRear Shocks Compressed Length: \u003c\/b\u003e11.13\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eRear Shocks Relaxed Length: \u003c\/b\u003e16.38\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eStrut Mount Insulator(s) Included: \u003c\/b\u003eNo\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eSuspension Type: \u003c\/b\u003eSpring\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eUPC: \u003c\/b\u003e806990234667\u003c\/li\u003e\r\n\u003c\/ul\u003e\u003c\/div\u003e\n\t\t\t\t\u003c\/details\u003e\n\t\t\t\t\u003c\/div\u003e\r\n\t\t\t\t\u003cdiv class=\"product__accordion accordion\"\u003e\n\t\t\t\t\u003cdetails\u003e\n\t\t\t\t  \u003csummary aria-expanded=\"false\"\u003e\n\t\t\t\t\t\u003cdiv class=\"summary__title\"\u003e\u003ch2 class=\"h4 accordion__title\"\u003eExtended Information\u003c\/h2\u003e\u003c\/div\u003e\n\u003cspan class=\"icon-caret\"\u003e\u003c\/span\u003e\t\t\t\t\t\n\t\t\t\t  \u003c\/summary\u003e\n\t\t\t\t  \u003cdiv class=\"accordion__content\"\u003e\u003cul\u003e\r\n\u003cli\u003e\n\u003cb\u003eCountry of Origin: \u003c\/b\u003eUnited States\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eEmissions : \u003c\/b\u003eEmissions Compliance Exempt\u003c\/li\u003e\r\n\u003c\/ul\u003e\u003c\/div\u003e\n\t\t\t\t\u003c\/details\u003e\n\t\t\t\t\u003c\/div\u003e\r\n\t\t\t\t\u003cdiv class=\"product__accordion accordion\"\u003e\n\t\t\t\t\u003cdetails\u003e\n\t\t\t\t  \u003csummary aria-expanded=\"false\"\u003e\n\t\t\t\t\t\u003cdiv class=\"summary__title\"\u003e\u003ch2 class=\"h4 accordion__title\"\u003ePacking Information\u003c\/h2\u003e\u003c\/div\u003e\n\u003cspan class=\"icon-caret\"\u003e\u003c\/span\u003e\t\t\t\t\t\n\t\t\t\t  \u003c\/summary\u003e\n\t\t\t\t  \u003cdiv class=\"accordion__content\"\u003e\u003cul\u003e\r\n\u003cli\u003e\n\u003cb\u003eQuantity of Each: \u003c\/b\u003e1\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003ePackage UOM: \u003c\/b\u003eEA\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eDimension: \u003c\/b\u003e9.5 x 63 x 8 inches\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eWeight: \u003c\/b\u003e75 POUNDS\u003c\/li\u003e\r\n\u003c\/ul\u003e\u003c\/div\u003e\n\t\t\t\t\u003c\/details\u003e\n\t\t\t\t\u003c\/div\u003e\r\n\r\n\u003cdiv id=\"sema-product-fitment\" class=\"product__accordion accordion fitment\"\u003e\u003c\/div\u003e","brand":"QA1","offers":[{"title":"Default Title","offer_id":63497456124044,"sku":"BJGM-R124-150S","price":4409.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0279\/3848\/8460\/files\/Mustang-Products-yukjh_copy_2.jpg?v=1793070981","url":"https:\/\/sema-search.myshopify.com\/products\/qa1-coilover-4-link-r124-150s","provider":"SEMA search","version":"1.0","type":"link"}