I have a Tial Blow off valve to. I'm getting tired of sending my turbo off to get rebuilt and all it was is the copper thrust bearing
worn out. I'll see here shortly if it works
Tial BOVs are known to be one of the best, if not THE best BOVs made. You can find them on ebay for $195, I bought mine with a silver finish from extremePSI (vendor out of Pennsylvania that sells on ebay). It makes perfectly logical sense that bovs will extend the life of the turbo by letting off all that back pressure when the thottlebody closes.. Anywho, there's my 2cents
I don't know exactly how much air the Tials can handle. I DO know that the 50mm they sell is one of the biggest and most capable available, period. It will handle anything a street driven car can dish out, that's for sure.