Turbo slant six post
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Good luck with your build.
Sure sounds fun.
I think a TDo5 is gonna be downright too little, but good news is there are many variants of the TDo5 turbocharger, and IMO a TDo6 20g (not OEM on the Cordia, or Starions) would probably be the best turbo for a 225 /6.
Keep us posted!