This shim is installed in the turret to correctly space the shifter ball. Not always required during rebuilds but good to have in case the shifter has too much vertical play.
Suits MX5 NA/NB 1989-2004
If you are rebuilding the shifter choose the one for your model below
NA 5spd shifter CLICK HERE
NB 5spd/small bush 6spd shifter CLICK HERE
NB large bush 6spd shifter CLICK HERE