Applied Model - B
Start - Sept 2001
End - Oct 2002
Model of Impreza - WRX STi
Applied Model - GDBB4EH
Gearbox Code - TY856WB1AA
Engine type - EJ207DW4CR
Power (PS) - 280
Shift type - 6 speed
That should help you out a little bit :)
cams and lightened flywheel mixed with air filter and exhaust then remapped would give you a good change, that's the route I would go. It's what i was going to do with my Fiesta Zetec S but I bought the Subaru instead.
http://scoobyworld.co.uk/catalog/product_info.php?cPath=40_64_400&products_id=405
Looks like that however the one in your picture looks like it's one piece. So could be this one and it's been filled to make it one piece or it's a different version of it.
I'm a sucker for wide body, if someone could do that to mine i'd love them forever ;) haha. I quite like the rivet style wide arch, when you can see the parts have been put on rather than the seamless look.
I know afterburner do angled exit, they are the only ones I've found. I prefer the look myself as well but seeing as I not long got a new box I'm going to wait.
Yeah sure I've got that laying around, I could get it to you for Tuesday if I post it Monday. The part is in my brother garage so can't grab it today as I'm at work.