I was wondering how would you get the extra power that is in the 2005 models??
Is it deferent engine archetecture?
what mod's would let you gain that extra HP...

 

The major difference is that the '05 engine has variable valve timing on the exhaust ports in addition to the intake like in the '04's. The rest is probably ECU and maybe intake/exhaust.

2003.5 6MT Sedan. Caribbean Blue / Graphite