i want to raise my rev limit to like 8200 so if i do catch boost late i can keep it for a while without catching and losing it by shitfting at stock rpm(7200).what all do i need to buy to got that high without blowing my baby.im not sure but dont i need the valve springs and valve retainers right. i want the skunk2 ones since everything else in my car is skunk2. what else do i need.thanks for the help in advance!!