Legacy B4 trouble (not really)

Hi to everyone!:)
I bought this 99' Subaru Legacy B4 about 5 months ago, I finally decided to do a full service, done everything, but the fuel filter. Have searched under the bonnet with friends and sales people from auto parts stores, but was not successful.
Does anyone know where the thing is located?
The car is: 99 Subaru legacy B4 RSK(JDM), 2L, 4 cylinder, 2 stage twin-turbo ,tiptronic.

Thanks in advance!!!:D

Okey, someone has kindly given me a solution for my problem.
For those wondering, the fuel filter is located under the rear seat, close to where the fuel pump would normally go.
Cheers.