Aftermarket catless downpipe. Unknown brand but high quality 1 piece 3" stainless. Has o2 bung near turbo flange and one down at the bottom for second o2. $120
Beat me to it. Yeah I was going to say these things sell for a good amount on Nasioc/IWSTI all day long if it’s in decent condition. I got $40 for my semi trashed stock WRX TMIC so you should pull some coin for the STi unit