That is not a stock turbo for an R33.
It appears that you have highflowed something like a VL turbo, then to adapt the stock exhaust on (dont know why you would use a stock exhaust with a highflow but yeh) they have cut the dump pipe to suit that turbo, welded on a flange for the RB2x turbos, then bolted your dump onto that...
Infact, on closer inspection, it doesnt look like a stock dump pipe either...
Honestly, I cant tell just from that 1 photo. Its really weird, good luck though.