This is an OEM Subaru 2.5L oil pan, required to fit a aftermarket headers on a 2002-2005 WRX. The 2.5L oil pan allows for clearance of the crossover pipe on the Perrin header. This is the stock oil pan on all 04-20 STi and 06-14 WRX models.
Part #: 11109AA131
fit perfectly, good part, quick shipping
Fit perfect on my 02Bugeye with Killer B pick up and killer B Baffle.
Perfect for my hybrid build. OEM as stated and arrived just in time