G'Day, bought a low km EL XR6 cylinder head a couple of days ago to replace my high km one, however I noticed that instead of only having the T and 95DT, it has the T and 95DT-6090-AA. Could any of you please tell me what those numbers mean, because I haven't seen a cylinder head with them on before and I couldn't find much information about the 95DT series head as well. Thanks