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
http://www.whiteline.com.au/docs/instructs/237_kca346.pdf
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.
Results
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/
Nice brand new parts... :P I'm gonna have to order a lot of bushing when times comes... I know who to contact to be pointed in the right direction now. ;)
Nick, Have any "long term" reports on these mods? I'm ordering the Anti-lift bits. What ball joint is that?
I went from a 530WHP GTR to a 220HP GTi-R, but I'm still smiling....
http://gtircanada.blogspot.com/
if you want to replace the stock bushings you can use moog bushings from a u.s 89 pulsar nx
or you can use the energy suspension for the 91-94 sentra 
you can't use the big one ,the smaller bushing is the same as the whiteline- cheaper alternative to whiteline or if you want to replace the control arm ,its the same as the 87-89 u.s pulsar
wingnut wrote:
I've had no problems.. car does tramline more. But the improvement in the front end is worth it. Instantly noticable. I actually have a left over anti lift / castor poly bush from Superpro for a pulsar NX, its purple in color. It looks the same as the black moog one listed above except the hole is offset like the whiteline. If you notice the bushing on the whiteline piece, the hole is a bit to oneside. If anyone wants it, its 40$ plus shipping. I was told by superpro it would fit with a bit of trimming, no idea what that means.
wingnut wrote:
That pic isn't mine, but I do have the same bushings. I don't have those ball joints. But i do have a bumpsteer kit in place, probably the most effective suspension mod so far. The oem suspension is garbage, all the little whiteline bits, bumpsteer kit make worlds of difference.