The Eibach spring adapter adapts springs between 3.5-inch and 3.75-inch diameters to enable use of alternative coilover or spring assemblies without modifying spring seats. It helps ensure proper spring seating and alignment during suspension swaps, simplifying installation when matching springs to perches or adjusting ride setups that require a different spring diameter.
Eibach 3.5in to 3.75in Spring Adapter