well i got my s5 turbo II motor like 3 days ago and its goin in my 1990 convertible. anyways the wastegate got damaged when the motor was shipped here. what size do i need. i mean i look and i see 35mm, 38mm,50mm and some other sizes. what would be a safe size to go with? i also got my front mount today. thank you

 

Are you going to run the stock turbo? How much boost do you plan on running? From what I've heard, a larger wastegate like a 50mm may make it difficult to consistently control boost levels under maybe 15psi.