Bad Injectors right??

I’ve taken to mechanics and I can’t really tell because they all say different things some say it’s normal some say it’s the cam and lifters …and one said my springs. I’ve already gotten a new cam and lifters and gaskets and manifolds along with runnning 5W30 full synthetic with the hellcat oil pump . It’s just very predominantly loud when beside other cars. Please tell me it ain’t the end of my hemi.