Thanks fabrik8, But I should of been a little more detailed on my finding... OUt of all the post I have read, It was only a few who had problems w/ the stock retainers on upgraded valvesprings. I saw where one guy has had 0 problems with the stock retainers and takes it up to 9200k all the time, and another guy had his whole valvetrain explode due to using stock retainers. Do you think its a assembly issue? Also upgraded steel retainers are another option I would like to look in too, But I cant located them... I'm about to jump on google again and do some more searching.