ARB shape
 

I just discovered that the 86 GRMN uses a 15 mm rear ARB like facelifted models, but with different shape.
Is there some expert that can explain what would change?
https://i.ibb.co/Jmr2Dr7/51z96-TBTb-ML-AC-SL1500.jpg
https://i.ibb.co/DtZPzNj/86stabilizerbar.jpg

The bar may have the shape to give access to the bolts on the rear diff mount

Cost cutting, less kinks = less material.

I wonder if having the "bend" closer to the bushings causes the bar to have a lower spring rate? Maybe more? Good find though.

I'm curious to see if the rear endlinks are different because look at the intense angles of the bar ends compared to stock. Makes me almost think theres like a 1" GR endlink or something.

This is interesting as I can't think of another example where different ARB geometries are used on the same vehicle.

I'm not sure why they would change the geometry but the change may result in a different spring rate.

To clarify, the GRMN is the black one, the yellow is a JDM TRD, same shape of the OEM.
Endlinks are different, too. It's my opinion that the spring rate changes, too, but I think there is something else, or a different diameter will be sufficient.
My two cents: shorter lever, stiffer spring.

Maybe some clearance issues with a different differential or bracing? Always good find from you though

Might be for clearance around what appears to be a subframe brace:
https://pictures.topspeed.com/IMG/cr...n-6_800x0w.jpg

Somehow exhaust headers in this pic reminded me of facehuggers from "Alien" :)

Nope, I have all the GRMN bracing, no interference.
Differential has the same housing, just 4.3 ratio and different TBR.

The rate of a spring is a pretty simple formula. It essentially comes down to the tensile strength of the material X material thickness and then factored by it's length. If the goal was to just decrease the spring rate it would be simpler to go to a smaller diameter. I wonder if they were having an issue with breakage and had to go to gentler bends.

But if bar is longer due extra bends, even of same material & thickness it should be easier to bend, no? Though in this case clearance of bracing sounds right reasoning.

ARB shape
 

Correct, but if the goal is to make it easier to bend(reduce spring rate) then why not just make it smaller? I think the issue is durability. Either the thickness of the bar doesn't like that bend, or a smaller bar is not durable enough so they went to a larger one and added more lever to it.



I don't think clearance is an issue. The bar is not really in the way of anything.

Here is the subframe with everything mounted out of the car. Not a great pic but there is no clearance issue that I have noticed.
https://uploads.tapatalk-cdn.com/202...f8f72cff4a.jpg

Maybe a bit stiffer with less weight instead of a larger one?