It's been suggested to me that it may be possible to keep the stock cat back.
Quick background what I am chasing. AVO turbo kit, running 10psi or so, 250-280whp is all I am looking for. Trying to set the car up to be as stealth as possible.
I will replace the stock over pipe and front pipe. But wonder if I really need to replace the 'cat back' (mid and rear sections)
Sony's review of the Perrin exhaust is great
http://www.ft86club.com/forums/showthread.php?t=16614 and I think if I have to go full exhaust, I will go Perrin. But, even Perrin's own videos show that just replacing the catback from stock to their unit increases volume. Add a over pipe and front pipe into that, and it will be louder.
As far as being 'stealth' the perrin cat back comes in a black finish, and the tips aren't OTT. So again, if I had to do the catback I would go Perrin. But, more 'stealth' that this, would be keeping the stock cat back.
In short, I'm replacing the over pipe and front pipe, but question whether I need to replace the cat-back for a FI 250whp setup.
If I have to do it, I will. But, I'd rather not. I'm not looking for any more volume at all. I don't think the stock exhaust looks bad, and would prefer to keep it.