As I said in your other thread as well as others on here, the cone filters on these will suffer from 'heat soak', so you will never see any gains, just create problems and a load of noise!

Best thing is the likes of the said K&N panel filter if wanting to uprate. Also mods like the ST170 shorkel can be done.

If you really want extra power then just buy the 2L as said, I believe they are easier to tune (Bang for bucks) you can get around 140HP from your current engine that said. I believe they really wake up with some SS7 cams, induction and exhaust mods but it all depends on what you want to spend and how far you want to go.

Martin