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QA1 Front Pro Coilover Kit - Single Adjustable, 650 lbs/in Rate - 2003-2011 Ford Crown Victoria fortune-auto-520-series-coilovers 1999 BMW 8 Series 840CiQA1 Pro Coil Systems for the 2003 2011 Ford Crown Victoria are a great option for anyone looking for fully adjustable ride height and valving control. Choose a spring rate and adjustability that fits your driving style, adjust the valving to match, and you are on your way. These shocks also utilize a fully threaded body that allows you to adjust your ride height for the perfect stance or to finely tune the weight balance for superior handling.