This was a long task, I had to make templates for both the front and back of the firewall. I put Newton Z-Flex aluminum with fiberglass glass backing on the front and KookMat on the cabin side of the firewall. The templates took a lot of trial and error. Once the template was done I cut a bit oversize and them trimmed down to a perfect fit. I used 3M adhesive spray to attach both. I let did each at the end of a day so they could cure overnight with a lot of clamps to hold in place.