PFF85-602G offers additional +1 degree of caster and is a high-performance option to PFF85-602. A2 models fitting advised for aluminium arms only and will not fit cast steel arms on these models. PFF85-602G offers additional +1 degree of caster and is a high-performance option to PFF85-602. Aimed at offering greater precision with improved geometry for people wanting the very best from their vehicle. This new part, fitted to the rear of the front wishbone has a hard-anodised aluminium outer shell with one of our unique low friction polyurethane centre bushes. The poly/alu combination creates a low friction rotating bush reducing the forces acting on the arm. Lower arm deflection has been decreased by reducing the compliant material within the aluminium shell. Additional caster angle will give more negative camber when cornering giving improved tyre to road contact. Results are improved geometry when turning giving additional grip, steering control and feel with less movement in the arm under cornering and braking. In our Road Series Purple material, stiffness is boosted by almost 100% over the original part, whilst our Black Series part increases stiffness by another 100%.