what am i looking at?
 

http://i909.photobucket.com/albums/a...psoicoenck.jpg

what part is the down pipe and what's the sensor called that usually plugs in to the pipe?

All of it is the down pipe, but I guess to be really specific you could say the left hand part.

The sensor is a lambda sensor for telling the ecu the air/fuel ratio. Or if 2 sensors then front I'd air/fuel ratio and after cat 2nd one is for diagnostics to see if cats are working ok.

Not sure if subarus have the 2nd one though.

thanks for confirming, mine's a 2001 saloon jdm wrx

On classics, that's normally just one pipe, Newages, that's the first and and second cat, except that's a sports cat, and a de-cated second pipe.

Prodrive sports cat and should have a secondary Lambda in the link pipe plugged hole.........

ok, great thanks mate

And if that's going on a Classic ?. Then you will need a newage centre section to go with it or it won't fit on a classic.

going on a newage

straight fit then as long as its not a JDM STi or a twin scroll car........