for a quick and easy way to get a good note depending where you take it just get the back box removed and straight pipe put back in its place, cost anywhere from £80-£150 depending where you go, wont affect your MOT or you warrenty.
or a full system can be bought for around £350.
induction kit can be fitted if you got quite a good knoledge of taking air filter boxes out and replacing them as the 225 is a bit tricky if you not sure.
as for better gain it is noticed on low down revs and slightly better pull away but the do get very noisy under the bonnet, induction kits for the 225 range from £25 for a universal thats works fine ( wat i run on my other 225, up to£250 for te viper kit by pipercross that is a sealed induction kit, with alot less noise but is expensive,
failing the induction kit you could just change the panel filter in your air box and still notice some gain in low down power and pull away and not have any noise, these you can get from ITG or K&N ( K&N im running on mine now )
hope this helps, anymore info mate post it up
or a full system can be bought for around £350.
induction kit can be fitted if you got quite a good knoledge of taking air filter boxes out and replacing them as the 225 is a bit tricky if you not sure.
as for better gain it is noticed on low down revs and slightly better pull away but the do get very noisy under the bonnet, induction kits for the 225 range from £25 for a universal thats works fine ( wat i run on my other 225, up to£250 for te viper kit by pipercross that is a sealed induction kit, with alot less noise but is expensive,
failing the induction kit you could just change the panel filter in your air box and still notice some gain in low down power and pull away and not have any noise, these you can get from ITG or K&N ( K&N im running on mine now )
hope this helps, anymore info mate post it up