It's a common thing to do, there should be some info on the web about it. I haven't done it though, still using HICAS. There are two versions, the early ones being hydraulic and the latter being electric actuated via a motor. Perhaps if you have the electric version, pull the fuse to disable it. If Hydraulic, perhaps do the same thing and fit the rear locking bar at the back. After all the years, the rack ends develop free play which affects the operation of the rear steering. The rack ends are easy to replace though if wanting to keep HICAS. The HICAS cylinder itself rarely fails but people have experienced some crazy mishaps for some reason. I'd say most likely to do with the electric side of it.
As geron says, if electronic look to disable it via pulling a fuse. If mechanical hicas, I would avoid a lockout bar mainy because any Z is likely to have play in the rear ball joints and rack ends. Replacement parts are getting more expensive to source and then labour for ball joints isnt cheap. I would instead recommend getting a full hicas replacement kit if going down this path.
Thanks for the reply. Mine is a mechanical hicas, has play at the rack ends. I reached out to Rob, but unfortunately he is out of stock. Was considering Tas autosport delete kit. Not sure what a full hicas kit is that you mentioned.
I also will require a hydraulic fitting kit to loop the lines. Not sure if Rob sells them separately.
What you've pictured there is a full delete kit as it deletes the entire rack end to end and replaces the ball joints with bushes. Personally I'm not a fan of polyurethane bushes for most applications however they will do the job and are probably the simplest option if you can press the rear ball joints out without having to remove the entire rear knuckle. As an alternative to looping the hicas lines in the engine bay, you can delete them altogether by removing the rear veins from the power steering pump so it no longer builds pressure and block it up with a bolt. A hicas pump has two sections front and rear so you'll retain normal power steering by doing this and it helps tidy up the bay a bit.
