everyone in my area has WRX's and STI's and when i finally decided to trry out the Subaru fad, i went with a 1998 subaru outback. i was wondering if there are popular upgrades for them, i know most pepople usually go with the imprezza or the regular legacy, but i wanted to be a little bit different, im new to subarus but not new to cars at all. it has the 2.5 and is automatic, and its got a pretty bad knock even though the previous owner recently had the radiator, head gasket, water pump and timing belt done. im assuming a rod or piston went becasue of a lack of oill. so i decided while i was in there fixing all of that, id try to make it a little bit quicker. all help and ideas are welcome and a large thanks in advance, Shawn.