The Global West McCastor plates are much stronger than the stock versions, and provide caster adjustments. They use a steel spherical bearing in place of the stock rubber bushing, so slop in the upper strut mount is eliminated. They use the nuts and bolts from the stock plates for mounting. The combination of large and small spacers allow the strut rod to sit higher at static ride height, which recovers some of the travel lost when using lowering springs. Unfortunately, this also prevents the use of the stock dust boots and bump stops.