hello guys

just wonder, how many km's can you guys get with a full tank of fuel?
ive got a my99 wrx, with just pulleys, inbox filter, turbo back exhaust and bov. i'm struggling to get anything more than 380km per tank (fuel lights comes on around 350 -360).

car also get fuel smell/strong exhaust smell after driving, even when i'm driving normally. is this normal or is there something wrong?

cheers