These can be found on many of the fastest Track and AutoX cars in the country and around the world
These uprights help correct geometry from lowering the vehicles, and allow for bump steer correction based on ball joint lengths and increased caster. The 2" drop version is designed for race vehicles lowered (on a 25.3" tire) measuring under 26" ground to fender.
Here's some details and ideology around choices that were made for the design of the front uprights.
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All uprights are anodized black and sold as a pair.