Aldan American 300354 Aldan American Track Comp Suspension Packages Aldan American 300371 Aldan American Track Comp Coilover Kits Summit Aldan American 300297 Aldan American Track Comp Coilover Kits Summit Aldan American Coilovers for C6SB4 ALDAN Fitment Industries. Aldan Springs are made from steel sourced and manufactured in the U. S. A. Attributes: Brand Name: Aldan American GTIN: 00683203809870 Color: Black Finish: Black Powdercoated Installed Height: 10 Maximum Inside Diameter: 2. 5 Spring Rate: 600 Extended Information: Country of Origin: US Emissions : Emissions Compliance Exempt Life Cycle Status: Available To Order Packing Information: Quantity of Each: 1 Package UOM: EA Dimension: 22. 5 x 8. 75 x 4 inches Weight: 12 lb