Hi all i have a 1997 impreza with a custom made decat pipe from turbo with a ninja exhaust. Does anyone know whether or not it would sound better with the cat' d centre or with decat?? Was thinking of putting cat'd centre section on?????

 

DEcatted will be louder, if that is what you mean

 

Got a mk1 Ninja bb on my MY00 initially with just the std centre and downpipe = sounded ok. But since going full decat (2.5" centre and downpipe) never looked back .

It all depends what sound your after mate. Best bet would be to get down to ya next local meet and take a listen for ya self.