i kno its probably not going to be a direct fit but it looks like you can make it work, if you port out your exhaust manifold. here tak a look, the pic on the left is from a 20b left, right 13b

 

I don't think they will, but you can machine anything.

20b top
13b bottom

 

ooo didnt see that, alrighty then thnx for the info

 

has this ever been done???

 

...but, why? what a waste of time...

 

it is my understanding that the 20B twins are two different turbos (HT15 and HT10) while of course the REW twins are HT12's.

 

somebody post some good pics of the factory 20B exhaust manifold

 

I actually thought about doing this not too long ago, but instead of trying to port match the 20b turbo manifold to work, what if you used the 13b turbo manifold and matched that to the 20b turbos?

Also, whats the differences between the 3 turbos, like is it 13brew, then 13b re, then 20b in terms of good, gooder, goodest.

 

Junk, junk, and junk ?

 

13b-re are the smallest(HT-10), i don't have the specs on the 20b turbos anymore, but i'm told that they can make 400hp on the 20b. The ht12 (rew-usdm) horizon seems to be about 350hp.

I'll see if i can't dig up those specifications.

EDIT: Model: HT15-6 (Hitachi), but this thread says that's only the primary.