Custom stainless steel 3" with Magnaflow hi-flow cat and muffler done by a local performance shop done on 19 April 2007.
At idle, it's a low rumble but not at all annoying. In fact, it's barely noticable. Once you get going, rumble gets louder but not annoyingly loud to the point where it's unbearable. The guys at the performance shop said it sounds almost like a Subaru. It certainly doesn't sound like a 4-banger Civic and it doesn't quite sound like my old six cylinder Maxima with exhaust.
Pictures taken by the shop
Turbo flange on downpipe

O2 sensor in front of flex section

Flange for downpipe and exhaust connection

Opposite view of same connection

Welding on muffler

View of stock and custom exhausts

Opposite view of stock and custom exhausts

Pictures taken by me
Exhaust on car

Another view of exhaust on car

Muffler

Hi-flow cat with extended O2 sensor cable

Downpipe connection to turbo

Straight on rear view

Driver side views

Passenger side views

Link to videos
Inside the car, starting the car and reving. Ignore my friend.
Link 1 - Myspace
Link 2 - Youtube
Driving around, average speed of 25-30 mph.
Link 1 - Myspace
Link 2 - Youtube
Driving around, average speed of 40-45 mph.
Link 1- Myspace
Link 2 - Youtube
Inside car reving inside a tunnel with windows open.
Link 1 - Myspace
Link 2 - Youtube
Outside car reving inside a tunnel.
Link 1- Myspace
Link 2 - Youtube