VW MK5 MK6 Coilover Install ECS DIY Coilover suspension kit for ford fiesta mk6 mk7 vi vii ja8 2008-2017 shock strut other items you might also like. A pair wrench for height adjustment and two spring install. High Tensile performance spring STRESS TESTED OVER 600,000 times while the spring distortion is less than 0.04%.