THREADED SUSPENSION KW VARIANT 1 BMW M6 E63 / E64 (WITHOUT ELECTRONIC SUSP.) The KW Variant 1 “inox-line” coilover kit is the ideal entry system for customers who want the technically lowest possible suspension setup or for those who want to customize their own. In extensive road tests, the experienced KW engineers developed a specific setup for each model, striking an optimal balance between sportiness, comfort and safety. The high quality of the stainless steel columns, corrosion resistant springs and compatible components give the Variant 1 a durability exceeding the life of the vehicle. Check first for your specific model for availability and price. Before placing an order, consult us to verify compatibility. *Images may not match.