Yeah they're your sway bar D bushes and yeah you can replace them yourself, literally unbolt the saddle and the bush has a slot in them so they just slip off. Measure your sway bar and go to your local repco, supercheap or BNT store, they'll give you the part you need. Looking at the pic there is a '20' on one of the bushes so i'd imagine its a 20mm bar, but always measure them just in case.