Bosch bypass or Aftermarket Blow off valve?

[2jz tt Aristo]

My factory blow off is leaking so i need a replacement.

My engine is factory (2jz) so should i just get a bosch or go aftermarket?

Where can a bosch bypass valve be had these days?

[Crampy]

Go for Bosch. That's what I've got in my Aristo.
You can get them from an Audi dealer.

They are not all equal though.

The part number you want is 06A-145-710N (Audi part number), or
Bosch 114 pn: 0280142114

[Evlc36]

I think I might have my Bosch one still lying around if interested?