I've got a 240sx supercharged V8 swapped with an M90 off a 3800. I'm making about 6 PSI after pulleying down to 2.8. That's just how these motors take boost apparently but I've noticed that I can't really hear the supercharger at all. I've seen Mustang guys putting "sound tubes" so they can hear their superchargers.. is it possible to do the same thing here? From the looks of it, it's literally just a rubber hose before the MAF, plugged through the firewall and into the cabin so you can hear the blower louder.