One unique item that The GMR has done is that we matched the stock lower ball joint taper perfectly. We will not disclose the exact taper but we can assure it is not either of the standard 7 or 10 degree tapers. With this being a unique taper we decided to custom machine a reamer that matches the stock taper perfectly to ensure quality fitment with the stock GMR components.
The GMR offers these uprights in two different styles, A stock height unit and a 1 inch drop unit as seen below. The image to the bottom left is a 1″ drop upright with a stock height one to the right. These uprights are designed around the stock caliper mounts and ball joints so they will bolt up to ANY C5/6 brake package along with any arms designed abound the stock uprights. These units are also available with a welded on steering arm for direct stock replacement, both in the 1 inch drop and stock height.
The new GMR fabricated uprights are only slightly heavier than the aluminum stock components with a weight of only 6.9 pounds each compared to the stock 5.8 pounds. The Stiffness to weight ratio of the GMR uprights are drastically better than the stock units at operating temperature (non-ambient temperature).
The GMR Uprights are designed to be universal, from stock replacement hubs to GMR front hubs these uprights will work with any C5/6 package.
