micky flinders

Has anyone delt with this problem in recent years. Is it fixable? Should i fix it or get new engines?I know there is a repair kit. However idont know what it will cost. Or if its worth fixing. I found old entries but not about who has actually had this problem and delt with it.Anyone know a repairer who has experience with this. I am located in Brisbane. My engines are 2003 f225 with 700hs each. The corrosion is causing exhaust gas to bubble out of the wrong spots.The motors run fine.