I've read on quite a few forums (this one included) people suggesting that the VF35 is not suitable for 2.5L engines due to it's small P15 exhaust housing, however as with all forum opinions I often wonder if the person posting this has solid information backing them up.

As a result i have spent much time trying to find definitive answers.

Can anyone help me with either a size comparison of exhaust housings between the standard TD04 and the P15, or with a Dyno sheet of a VF35 on a 2.5L or any other relevant documents?

The only solid information i have found thus far is this greek website which actually has a very promising looking dyno sheet (if the information is accurate)
https://translate.google.com.au/tran...06-stage1.html

I am interested in finding this out as i am looking at putting a 35 on my 06 wrx... i'm not chasing big HP, just want it nice and responsive with a bit more pull than the standard car.