hi havent used this site for a while but i now getting my subaru back on the rd and doing another engine rebuild as its been off the rd a while. I have a cdb with forged parts but i was looking into putting version 4sti heads on the car and was wondering what is involved and what parts are needed my car is a version 2 sti

 

You need the version 4 inlet manifold and front entry turbo or convert your own

 

The V2 manifold will bolt on the V4 heads, no need for a change.

 

This is the correct information. Version 1 to 4 are the same design and then there are versions 5 & 6.

 

thanks for the help now need to source one and see what other mods are on the cards