Sorry,
Poly is the material, WALK is a brand (Whiteline Anti-Lift Kit)
You want:
Superpro front arm control bush ref: SPF3346K
Superpro rear arm control bush with anti-lift ref: SPF3273K
Anti lift basically means an increase in static caster, which generates dynamic camber. It forces the inside wheel down to retain traction and cambers the outside to increase tyre footprint. In tandem with your diff and decent geo, it'll feel a million times better if you add these. I was one of the first to use the more expensive Whiteline version* years back and it's very impressive.
The only difference is Whiteline supply their own metal mount, you press the Superpro one into the OEM one instead.