wastegate sizes please!

That co. With that kit is the one that made me wanna turbo mine but I don't wanna buy there kit. I feel it will be cheaping to piece it together. I like tial turbo stuff. Looking at there 42mm wastegate. I see some stuff online about Turbo builds but not much. I'm thinking about running stock manifolds turned backwards and run my own piping to the Turbo. I'm pretty sure I.like the hx35 Turbo.