the 16g you have looks to be nice downfiring coversion.
problem with 20g turbos is the only internally gated bolt on made were the sleeper 16g versions. basically a 20g inside a 16g turbo. 95% of the rest of the 20g feild use the td06 larger compressor cover. getting wastegates to work on the housing can be a challenge
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want a piece of the yellow car? (buy it)
you have to beat the blue car first
and then you have to take on the IV
my favorite quote
"if the solution is simple, God is answering"