Pedders EP9166 Radius Rod Bushings 04-06 Pontiac GTO Urethane Radius Rod Alignment Bush (2 PKT) Suspension bushings are the link between your vehicle and it's springs, struts and shock absorbers. Suspension bushings provide the movement and/ or mounting points in your vehicle's suspension system. This product offers a -0.5 to +1.25 Caster Change but can also be set to a Standard setting. Direct OE Fitment Adjustable Caster Hardened Crush Tubes Knurling