Put a more aggressive roller cam in my 5.9 Magnum and found I needed longer pushrods. I saw an ad one day for a new set of Mopar Performance Roller Rockers with pushrods, and the price was right. I installed them and everything seemed correct. Just got a new Mopar Performance catalog, and the rockers I used, P5153852, are listed as "for use only with/required for cylinder head P5153847. This is the Magnum aluminum cylinder head. There is another set of roller rockers, P5007404, that are listed for production and R/T heads. Am I going to have a problem with these so that I need to remove them? I haven't fired the engine yet, was going to fix the valve cover interference next.


"Four out of three people have a problem with fractions"