The sheet metal firewall cover kit! Installation with minimal bodywork to finish (can even be seam sealed). Kit welds right over your existing firewall. Don't cut out that firewall. Don't spend hours cutting out little shapes, welding holes, and wearing out your fingers body working the crevices. Just cover it with our Firewall Doctor Kit. 47-55 kit works with V-6 or small V-8. 55-59 kit works with large or small V-8.