That TCT is dead quiet in the cab. But outside the truck is a different story, it screams like a supercharger. I'm very suprised how quiet it is in cab. But most boost I've hit is 40 pounds. Might get a little louder at 60 if it hits that. Plus I have a pretty massive up pipe leak I'm fixing today. Gonna clean up the stock gasket and throw it back on til I can get a set from rick. Has to be better than the one that's in it. I ran down a duramax with under glow lights last night with a slippy clutch on my second tune. I ran right up on him feathering it and stayed there. I have an outside sound clip I'll try to upload. Gopro went dead on me last night so its with my s5