I remember reading a thread and someone mentioned a site that had parts for older subaru's that could increase your HP up to 180 or so. Does anyone know what I am talking about?

do you mean http://ramengines.com ?

or do you mean http://www.sub4.co.nz ?

 

There the only preformance sites for old subies I know of.

Do you people know of any others?

oops - that site didnt have it afterall ......

I think all the ones I know of have been listed

http://paeco.com/