Invidia has just released their large diameter piping exhaust manifold for the 2.5L turbo Subies (06+ WRX/ 04+ STi & 05-09 Legacy GT). The 2.0L models will need to convert to the 2.5L oil pan. This Invidia exhaust manifold was designed for improved exhaust flow to get increased exhaust flow for a big stock location turbo.
Retails at $1340 and its now available. Part # HS05SW1HDP