2004 wrx ppp
Stainless steel de-cat up pipe to turbo, stainless prodrive 200 cell sports cat down pipe, hayward and scott stainless de cat link pipe, hayword and scott stainless centre section 2.5" (how will i know if its resonated or not? As im unsure), prodrive stainless back box.

Looking for something a bit louder. Would replacing the back box be enough to do this? A ninja for example.

 

I went the other way and took off my H&S jap back box in favour of a quieter one so yes, if you change the back box it will be louder!

If the centre pipe has a silencer looking thingy on it then it's resonated, if not and it's a straight pipe(again, what I have), then it's not.

Dave

 

Cheers mate. Hope it sounds good then.