Fitment Information BMW 420i / 428i / 435i F32 (2013, 2014, 2015, 2016, 2017, 2018) Specs & Features Front Drop Estimated: 1.00 Inch Rear Drop Estimated: 1.00 Inch Additional Notes: Drop may vary depending on different factors including engine size, weight, tires, and other conditions. Product Description Grip, Traction, Form. Increase performance with a functional drop for daily driven street cars. Each spring has been engineered and tested with the best progressive/linear spring rate to increase tire grip, entry and exit speeds through turns, and improve braking power.Manufactured using high quality steel, powder coated, heat treated with advanced coiling methods and technology.All GT-F and GT-S springs designed for maximum travel motion and useable stroke with your factory struts/shocks.