Suits Nissan Patrol Y61 GU TD42, TD42T engines.
Suits Nissan Navara D22 with QD32, TD27, VG30 & VG33 motors
This is the Cap that screws into the fill Hole in the rocker cover.
Comes with new O'Ring fitted.
There are 2 lengths of thread with these caps, this is the Longer option.
The Distance from the end of the thread to the Oring is 13mm