A friend is in the process of doing an xpz build,when we pulled his lifters they were scratched up pretty good. The comp ones on zzp site people said were noisy(not that our valvetrain was ever whisper quite lol). Most who went with the comps went back to stock do to the noise issue. I/we were wondering about these.
GM Performance 12499225 GM Performance Parts Roller Lifter Kit
Opinions and knowledge is much appreciated.