I think its called the 475 or the VI Saleen series blower. It comes on the 07-08 S281 sc cars. Anyway how do I get this thing to scream a little. It is almost silent!
not sure if you have a serpentine belt driving the blower or not, but if you do... get a gatorback belt. that added a lil extra whizzing sound to the kb. also, get a pulley.
FWIW, we had a few blowers ported. Didn't do much unless you were really pulleying the hell out of it (2.75/15% cars) which really should be an aftermarket blower at that point.
Don't upgrade the exhaust, pulley and CAI if you want the sound.