These durable front and rear polyurethane bushing upgrades last up to 5 times longer than original equipment rubber bushings. We offer a number of firmness options with our Polybush Kits—allowing you to tune your ride performance from a soft to stiff ride. These polybushes keep radial arms and panhard rods supple and responsive. Blue polybush sets offer a softer ride, orange polybushes provide a medium ride stiffness while red polybushes offer the stiffest ride.