What is an approved aftermarket brand for an overhaul kit? I have installed several Maxxiforce kits in IH engines and I have to say I've never had a problem with any of them. I know some will not agree, nobody agrees on everything. What about AgKits? Not sure what brand they sell. I'm thinking of an exchange head also. They offer a "new" head that seems pretty reasonable. Is it junk? If it's new, who would be manufacturing a new head?