the Supernerfs (used to be made by Mark Hinkly at ORGS MFG) and now produced by JKS are great nerfs.
the 2 leg, Vs. 3 Leg doesnt really make a bit of difference, the lateral support is fine. I also like the adjustability of the legs (they are telescopic and when you get the right spot you plug weld them)
they mount to the pinch weld in 5 places at the main square slider tube.
They will require slight modding to your fender flares if I remember right..
I have a set on my ZJ and they are great, they work as a great "pivot" point on tight obstacles.
Jim @ JKS makes a great product.from a Great Design that Mark made.
FWIW, this my 3rd set of them on 3 different vehicles, a Cherokee and 2 different Grand Cherokees, Mark starting making them back in the early 90's,
I bought my first set (before mark had a jig for them) and they cost me over $600!!!!
at around $300 they are a bargain.
The boulder bar products are great also, I do Not think you wil go wrong with either one.
Its just a matter of which style you like, Square Tubing, Or rounded tubing..
I personally just think the round tube looks a little less "home" built, but that is just my .02C whatever that is worth
Here is a pic of them on my ZJ
