I've got an 03 WRX with PPP.

Just replaced the centre section with a deresonated Afterburner pipe but still want more noise without touching the cats.

In terms of loudness is there much difference between the Afterburner Vortex and Blitz Nur Spec S?

 

i have had both, blitz was asbo loud and i think afterburner is just right

 

my wife can hear me a good half mile away(3 inch decat blitz)
not very subtle i can tell you!!!