Lobban

2008 Silverado 1500 4.3l engine. I have a exhaust leak on the flange ( picture attached) I believe that there is a “donut”type gasket that goes between the two flanges, which makes sense to take up movement of the exhaust system.The local agent tells me that where is no gasket there just two metal face bolted together.the bolts are rusted so will probably not be able to be reused so I would like to get any info on this before pulling it a part. Thanks for any advice.