Does anyone know what the part number or what i should be asking for when i go to buy a new gasket for the passanger side when replacing my h pipe with an x pipe. I want to just replace it when changing it so it definetly doesnt leak. I read somewhere on here that it was only like $10 but when i went to the dealership they tried to sell me something that was $65. They said it was two gaskets on each side. Or can i buy this from somewheres else like autozone or is it a ford only part? Thanks for any help.