The upgrade is only for the early covers and summit sells the kit for 44 bucks and it includes crap I don't need that drive the cost up. I'm going to send an email to TFS with my old summit invoice when I purchased their covers and see if they will just send me the plates and nuts and bolts for my covers. I shouldn't have to pay to fix a manufacture defect.I wonder how much that baffle upgrade works? It's a shame because imop these are the only decent valve covers for sohc engines.