Was this kit purchased new? If the kit was supposed to come with 30# injectors but was shipped with 36# injectors by mistake, seems to me AA should have been willing to exchange the injectors. Did you pursue this avenue with CA-Automotive? If CA sold and installed the kit, it's their responsibility to ensure that they installed the correct parts for your car. Assuming they are an authorized AA vendor, perhaps AA can convince CA to do the right thing here. You shouldn't have to pay anything, much less $600, to get the right injectors for your kit.