I have read all the post on this thread,and I have a question for all the people that have been runing turbo's for a while on 420a engines? All I want to know is what will I need for a hrc stage one to keep my engine safe? I WILL NOT be going over 5 psi for the time being,cause I live in England and, its not like I can just go to any mechanic and get my car fixed if I have a prob. I eventully will go stage 2,but that won't be for a while from now. I am ordering the kit this Friday and, I want to know what I need to replace to have a sound kit! Thanks in advance