u/Friendly-Sherbet8940

Hey BK MPS homies, yall heard this rattle before? Gets worse when aircon on, pretty sure it’s not the chain as again gets worse when a/c is switched on and only bad at low/idle RPMs - I would say worse on drivers side so not HPFP and I know the injectors are naturally loud, I’m thinking serpentine belt! Let me know what you think and If you’ve experienced this noise before