ASTAST is a manufacturer of high quality polyurethane replacement bushings and components for automotive applications.- Heavy Duty. Nissan does not offer this bushing separately from the control arm. PSB 258A will allow the replacement of the wear-prone OE rubber bushing with a more durable polyurethane one (and without the expense of having to replace the entire control arm)Assenmacher Specialty Tools (AST) manufactures a full line of specialty automotive tools, cooling system adapters, oil change products, for all vehicles

ASTAST is a manufacturer of high quality polyurethane replacement bushings and components for automotive applications.- Heavy Duty. Nissan does not offer this bushing separately from the control arm. PSB 258A will allow the replacement of the wear-prone OE rubber bushing with a more durable polyurethane one (and without the expense of having to replace the entire control arm)Assenmacher Specialty Tools (AST) manufactures a full line of specialty automotive tools, cooling system adapters, oil change products, for all vehicles