Hachibill made a good point that there is no such thing as a "ct20b." There is a ct-26 on a gen2 3s-gte, then the gen3 just shows up with a random bad-ass turbo which is not a ct-26. Since so many people call it a ct20b, the board just sort of decided to just call it that anyway, even though it doesn't technically mean anything. Mr2 owners need to pay special attention to that fact when buying turbos on ebay because there was a ct-20 installed on toyota trucks in the 80's which is not the same turbo as the gen3 3s-gte turbo. That little technically non-exiatant "b" goes a long way sometimes. Either way, the "ct20b" or the gen3 3s-gte turbocharger is a sweet turbo.