Review on 🚗 Enhance Your Vehicle's Performance with the Energy Suspension 9.6120R Universal Coil Spring Isolator! by Carlos Block

Thickness is about 9/16 inch assuming 1/2 inch can be assumed when compressed. My 2000 trans am rear springs were about 1/2" lower for my liking, I put them over the factory rubber isolator to add 1/2". I trimmed the edge but left just a little room on the edge to center the insulator within the factory insulator. I used tape to temporarily hold it in place prior to installation. It was a much cheaper and easier way to add coil springs by 1/2 inch without changing the spring rate.