Robin, Does the GMPP stage 2 cam come with lifters if not where can I get lifters to match that cam, also will the factory valve springs work or will I have to get new ones. The stage 2 cam doesn't change the lift over factory on the intake side but adds about .030 on the exhaust side. Would you happen to know how this cam makes the car idle? Because I am looking for some lump. Any help you can give on the subject would be greatly appreciated.