YES those are 34 dumps.
Also another way of telling is the provision for the temp sensor in the rear dump pipe.
My car made 278 with hi-flow turbos with the standard 32 dumps, having said that I dont think you would need much more than that for your setup.
The 33 units are a fair bit nicer than the 32s, in terms of smooth curves inside, and the 34s even better again.
So all in all 32 units would do the job but if you want to spend money then get 33 or 34 units.