Revive an old thread, I have a ‘22 RAM 2500 w/ 6.4 and wanted something a LITTLE louder than stock and insist on no drone. I’m an old guy and had enough of loud exhaust but wanted more rumble than stock. I installed the MPI super turbo system on my truck, very happy ! A little louder than stock, in cab noise stayed the same as stock and NO drone, even in ECO mode.