Legal for Both SCCA and NASA Competition. There are others selling different makes of extended lower ball joints, but they are NOT legal for SM in SCCA or NASA. These ball joints are the only legal ones you can run.
The extended Lower Ball Joint for the 1990-2005 Mazda Miata safely allows increased negative camber for track and street vehicles.
Price is for (2) ball joints, (2) nuts and (2) cotter pins.