The Ironman struts are for the 40mm lift given with their springs or most pther after market springs and since OE sag quite a bit I think a bit of lift is better than being sagged.........
The strut is in 2 pieces, the actual piston section screws into the lower mount yoke and is locked in place with a locking ring, its not adjustable for height though, this saves having to drop the axle/CV on both sides which since they have a stupid lock nut saves a lot of hassle, here's a pic of the OE strut and if you look where the yoke is connected on the Ironman its a screw coupling and a bit more substantial, removal of the old strut is done by just cutting of one of the legs, certainly makes for easy repair if needed.
This pdf link shows how along with pics;
https://www.google.com/url?sa=t&rct=...hTsCnaNIj4mZRu
OE strut..