I have for sale a Tial 50mm blow off valve with brand new wrx flange on it. Decided to go a different route. These go for around 270 brand new without the bolt on flange. Asking $175 obo SHIPPED in the US. Location is in sioux falls sd 57103.
I dont know what pressure spring is in it, i pulled it out and its a larger spring that has a little yellow on it.
the spring does look to have been cut as well here is a picture of the spring. I also have a red one that came out of my old tial wastegate that can go with it (i heard you can use wastegate springs in these bov as well)