We've been working with Karcepts to develop a new version of their ND/Fiat 124 spherical bearing top hats specifically for the Ohlins coilover system. The result is what you see below, 6061 aluminum hats with PTFE lined spherical bearings that are a drop-on fit to the Ohlins. Offers the most direct response and performance of the shock by eliminating the binding that can happen in rubber bushings.
Karcepts Spherical Upper Shock Mounts for Ohlins Coilovers
We used these hats in our Grassroots Motorsports face-off between the ND and Fiat 124 at Streets of Willow where they performed perfectly.
Keep in mind that rubber bushings are used in factory hats to reduce NVH. Switching to a bearing improves performance and consistency in the handling but it can also increase NVH slightly. We recommend these for the performance minded individuals who understand these trade-offs.