[jpnovak]

In this case I suspect these are the bushings offered by Elephant Racing. Chuck's products are wonderfully thought out. I the case of these bushings the do not need to flex. Suspension a-arms and spring plates work by swinging an arc around a fixed point. This fixed point is the front or rear torsion bar. the arc created is the suspension travel. Suspension engineers are constantly in battle with having a compliant suspension that does not transmit road noise (think rough roads and tire hum/vibration) that also is precise in its movement.

These brass bushings are to correct a few problems with the alternatives. When new the stock OEM rubber bushings work well. They reduce noise transmission into the tub and function to move the a-arm or spring plate in its intended arc of travel. As time moves on, the rubber flows, cracks and compresses causing changes in suspension geometry and ability to perform.

The rubber bushings are hard to replace up front. They need to be vulcanized to the a-arm to work properly. this is beyond the typical repair facility. The polymer bushings are a cheap alternative to stock rubber. These urethane composites have problems with fit (wrong diameters) and require a lot of trial and error work that is best done using a lathe. In the end, they still squeak, pop, bind but still function to limit geometry changes.

Enter the Poly-Bronze bushing. These are hard bushings. Its more like a bearing than a bushing. These can provide nearly friction free performance while maintaining strict suspension geometry. Some people claim a bit more noise transmission into the chassis but I suspect there would be a smoother ride as the suspension is now free to move as it was originally intended.

I think these are a great upgrade, especially if you are tracking the car.