Miata rear upper control arms are adjustable for camber, to get rid of unwanted camber when lowering vehicle and running on slicks or increase camber when desired. This kit is the bare arm with eccentric bolts. Supply your own bushings. Sold as a pair.
The factory upper outer bushing MAY be able to be bored out at a gradual pace or you will need to purchase the mazda factory front lower control arm bushing [ NA01-34-490 ][ OEM ] to replace which has the correct bore for the eccentric bolt.
There is a core charge for this item of $20.00 per arm or $40.00 per set