non turbo

[isthisthingon?]

hi all,i have just joined this forum after owning my forester for two years. I live out in the sticks in a very hilly area so my forester with low range and high wall tyres is spot on especially in winter but it could do with a bit more horsepower just to pep things up a bit. I could go buy a turbo version but dont want low profile tyres and loose the low range box, so has anyone managed to do any sensible upgrades ( ive already got a pipercross air filter), cheers