I bought a used set of SLP's that look grand new. For whatever reason the previous owner cut th flex and downpipe off and kept them so I have to fab a custom downpipe. No big deal however, I test fitted the rear header and it rubs the heat padding on the firewall. Everything on my car is stock with the exception of lowering springs and Vinnies craddle spacers. Has anyone else had issues with headers hitting the firewall? Any suggestions?