3.75" ID Coilover Springs

Eibach 3.75" inner diameter coilover springs are built for Fox 3.0 and King 3.0 coilovers, the larger-diameter, race-grade coilovers used in long travel and performance desert builds. These builds carry higher load requirements and more precise rate specifications than a standard truck coilover setup, which is exactly why AccuTune treats 3.0" coilover spring selection as its own calculation rather than scaling up a standard recommendation. Available across a full range of spring rates and lengths matched to common 3.0" coilover configurations, these springs are sized for the higher oil volume and heat capacity that a 3.0" shock body allows.

AccuTune calculates the correct spring rate for your specific 3.0" coilover application as part of the standard consultation process, accounting for vehicle weight, intended terrain, and how the build is actually driven rather than treating every long-travel setup the same. The same free spring swap service applies here as on every other Eibach spring AccuTune sells, so a rate that doesn't feel right after installation gets corrected at no charge.