I have two pumps. The one that runs all the time goes ERRRRRR!! all the time. The second pump that is trigger by a hobbs switch is so quiet I hot wired it this weekend to make sure it was working. Doesn't make a sound.

Well, that is exactly my luck lol

 

My walbro is quiet...well, I'm not sure because I have Hooker LT's no cats, SLP Loudmouth and Richmond 4.56 gears, Monsoon Stereo (replaced all speakers with Cadience component sets) + 10" Kicker Comp VR fed by 600 watt Rockford Fosgate amp. I don't actually know what is the loudest part of my car