Diffrences between the 13BT and 13BREW??
 

Hey Ive been wondering this for a long time. What are the diffrences in the 13BT and 13BREW engines?? Obviously the turbo/ecu set-ups are a world apart, but what about the internals?
also I assume the Fuel system is quite diffrent as well?

I was also wondering why the hell I see turbo kits for TIIs selling used for $800, and the FD kits Ive seen are $1200+....???

btw I searched, but there is no descrimitive answer to this simple question! (at least that I could find)