Upgraded replacement ball joint for NA and NB models. CAD designed and CNC manufactured performance race-style front upper ball joint. 20% less drag then OEM, fully rebuild-able and lash adjustable, built-in grease fittings for ease of maintenance with hardened stud. Black oxide coated for all-weather service. Great for project cars using Miata upper control arms. Includes new boot.
If you are building custom arms we also stock press in rings for these ball joints.
Sold individually, price is per joint (1) two units are required to complete the car.
Note: Our UBJ will press into and work with factory arms. The stamped material of the factory arms is thin around the UBJ area. We Recommend two small tack welds opposite of each other for additional support.