Ok so how much louder is a vortex or raptor Than a ninja backbox, really wanna get something a bit louder but can't afford a blitz, is a race pipe a bad idea?? I already have a cat back 2.5 diameter don't really want to decat it all
Any advice would be great

 

I have a afterburner vortex on my02 Sti with my standard prodrive sports cat and is pretty loud without doing ya head in!!!!

Harri