by fivebob » Sun Jul 29, 2007 12:38 am
The Caldina has it's own turbo, which is cast complete with the manifold. It's not a CT20B. It does have the same compressor housing, but the exhaust turbine is a single entry with a large circular wastegate, where the CT20B is twin entry, with an oblong wastegate.
If you wan't to use an aftermarket manifold then any one that is designed for the Gen III 3S-GTE will work(ST205 and late model SW20), but you will also need to buy another turbo as well and add one more stud to the cylinder head.