Dump valves - knock offs any good?

[Thuppu]

So I have been planning to install a big BOV (50mm), and I guess Tial would be one of the best..?



But are the knock off valves any good? 100 meters from me a car parts store sells a china BOV for 65 euros. It shure looks like a Tial. Should I try it? I'll guess that a BOV isn't as critical as a wastegate, so the copy may work fine..?

Here is a pic of the copy BOV:

[da_trem]

I run a Kamak 50mm Bov. It works great and its very good quality.

http://www.ebay.co.uk/itm/Blow-Off-V...item1c11996480

[Thuppu]

That Kamak looks sharp. A black BOV would suite in the egine bay better than alu. Also my WG is black...

[da_trem]

Oh, and they come with 3 different tension springs.