KW HAS spring system is designed to be used in conjunction with the factory BMW, electronically adjustable dampeners. This system retrofits adjustable threaded spring seats and sport springs to the factory suspension. Allows ride height adjustments of 0.4" to 1.2" lower than factory height in the front and 0.2 " to 1.4" lower than factory height in the rear. Backed by a limited lifetime warranty.
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