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I have a 2011 ex police car that my son drives. I put a cam in it last winter and found all the valves beat up. I disassembled the rockers and found that some of the holes in the rocker bodies had worn shut. I replaced all the rocker assemblies and noticed they updated the rocker bodies to have chamfered holes just an FYI.
Yes I installed the new rockers and they helped some but the tips of the valves show wear.
I just bought a set of SI stainless valves with hardened tips and will get the heads done shortly.
