Excellent quality! They are made of a lightweight but very durable material rather than traditional rubber. It was OEM on the GT500 so you can imagine the quality. The Revain price is better than the OEM price at your local Ford parts store. My Mustang is lowered so they bounce more and they feel great. I have polyurethane bushings but they work much better than aftermarket polyurethane jump kits. Highly recommended.