The factory front upper shock mount for the NC MX-5 Miata chassis relies on rubber bushings to provide articulation. They wear out over time, can dry rot, even come apart completely. The worst part is - even when these mounts are new they have a lot of slop and "slow down" damper reactions to vertical inputs in the shocks. We can fix all of that.
Vorshlag has been making spherical shock mounts for over two decades for a variety of chassis: BMW, Corvette, Miata, 86, and more. These mounts specifically for the the NC are made in house here at Vorshlag and feature our oversized spherical bearing you'll find in our camber plates.
In early 2025 we introduced the rear spherical shock mount, which uses the OEM cast aluminum "towers" and we machine those to have a spherical upper mount. In Fall of 2025 we added our CNC machined front shock mounts, which replace the factory top mounts.
These can be ordered for 10 or 12mm shocks shafts and re-use the upper spring perches that come with your coilovers, or you can order them with Vorshlag supplied, radial bearing upper perches for 2.25", 60mm, or 2.5" diameter coilover springs.
Our shock mounts are beefy, and as strong as a tank. They can be adapted to most front shocks. Removing the rubber bushings from the top mounts and replacing them with spherical mounts will improve suspension articulation and movement.
We machine these in-house from billets of aluminum, and raise the spherical mount relative to the chassis for maximum suspension travel. We have drop-down options for known shock stem profiles. We can also configure our rear shock mounts for virtually any coilover damper, with some information you provide. Please see the sections below to help us build your set properly for a noise-free, perfect fit.
We try to keep everything in stock for fast delivery, but if you are in a rush PLEASE call us at +1 972-422-7179 to make sure we have everything you need. Thanks!
UPPER STEM DIAMETER: These shock mounts are designed to work with virtually any front shock. We use different upper and lower bushings (spool pieces) to adapt the big 19mm ID of our spherical bearing to the shaft sizes of the very top of the front shock. YOU have to tell us how to build your shock mount assembly by picking the proper upper stem diameter of your rear shocks at the drop down menu below.
The part we need to know from you is the very top - which will have a 10mm/M10 threaded or a 12mm/M12 threaded upper shaft stem. Typically an OEM or non-adjustable shock has a 10mm shaft and an adjustable aftermarket shock has a 12mm shaft. The shock mount sits on the shoulder or step where it goes from the big diameter and necks down to the small upper stem diameter. See the images below for a better explanation. If you are unsure about shock shaft upper stem option to choose, please email or call us.
