If you're running your NA or NB Miata hard on the track, you're probably burning through front wheel bearings on a regular basis. And that means you're losing track time or races. ART knows this, so they've put together these blueprinted hubs. They start off as factory hubs, but they're carefully checked and packed with a high temperature grease. They'll cut down your failure rate dramatically.
Sure, they're a bit more expensive. But they'll last a whole lot longer than stock ones, so you'll save money in the long run.
Available either with stock studs or with strong extended ARP units. If you go for the ARP units, you will need to press them into the hubs.
These hubs are not compatible with ABS rings, so you will lose your ABS. Sold individually. Nuts are included, but new dust caps are recommended.
Recommended installation is to have everything very clean, install and torque to 145 ft-lbs with a proper torque wrench, not power tools.
Sold individually - that's one hub.