Spring ID Adapter 2.5in to 3in

The Spring ID Adapter 2.5in to 3in from EIBACH is a precision-engineered coil-over adapter designed to bridge diameter mismatches in suspension systems. This adapter solves a common installation challenge: enabling the use of 3-inch springs on platforms originally designed for 2.5-inch coil-over assemblies. Whether upgrading a custom suspension build, retrofitting components from different manufacturers, or maintaining compatibility during a spring replacement, this adapter provides a reliable transition solution for enthusiasts and professional installers alike.

Manufactured from aluminum and finished in black anodize, the Spring ID Adapter 2.5in to 3in delivers both durability and corrosion resistance in demanding under-vehicle environments. The black anodized coating protects against oxidation while maintaining a clean, professional appearance. At just 0.161 lbs, the adapter adds minimal weight to the suspension assembly, ensuring no negative impact on vehicle dynamics or handling characteristics. The compact profile—measuring 7 x 0.75 x 10 inches—allows for straightforward integration without requiring extensive fabrication or modification to existing mounting points.

This adapter is essential for suspension builders, custom coil-over enthusiasts, and technicians working with mixed-component systems where OEM or aftermarket springs exceed the original bore specification. Installation is typically straightforward, requiring only proper positioning around the coil-over strut during assembly. The aluminum construction ensures longevity without sacrificing structural integrity, making it suitable for both street and performance applications where suspension geometry must remain precise. Verify mounting orientation and spring seating before final torque to ensure optimal performance and safety.