Installed both these bushings.
I wouldn't recommend doing this yourself unless you've got the right tools.
Install time approximately 2hours.
Install guide here
1. Remove wheels
2. Disconnect sway bar links, ball joint.
3. Undo front lower control, 3 bolts. 2 in the rear 1 in the front
4. Remove arm.
5. Remove rear bushing. Put bushing end in vise, lubricate, twist the arm around and out until it pops out.
6. Burn out front bushing, cut and do whatever it takes to get it out.
7. Take an air hammer and push out the metal ring left in the front bushing location.
8. Put metal sleeve that comes with KCA346 kit onto arm. Then slide bushing on with grease.
9. Replace front bushing, comes split so no press required.
10. Redo arm in reverse.
Firmer ride of course.
Steering is much more precise.
On acceleration the car doesn't lift as much so more traction.
Dives more on braking i find it actually helps.
Turn in is sharper and less understeer. Really hugs turns a lot more. Point the wheel and the car actually goes where you point at speed.
Car handles far better.
If you care about handling, this is a worthy mod.
Typical pricing retail
KCA346 180-200$ https://www.whiteline.com.au/store/default.asp?part=KCA346
SuperPro SPF1341K or Rallynuts PFF46-101 50-80$ http://www.fulcrumsuspensions.com.au/fulcrumCat/