Greddy T67 wastegate question

[bchumley]

Looking for some help. I bought a used T67 turbo, manifold, and downpipe. No wastegate was included, and I'm trying to figure out which one I need to buy? I hope this isn't a stupid question. I saw some for sale on greddy's website, but they're almost a grand, so I'm hoping that I have other options.

[HiPSI]

there are TONS of options for external gates. HKS and Tial seem to have the best track records though as far as reliability goes.

[bchumley]

I see a bunch of different sized ones, such as 38mm, 40mm, 50mm. does that number represent the size of the opening for the wastegate?