its not realy any louder than standard but it flows more cool air so you get better power and throttle response.

the snorkel is a cold air feed but theres 2 down sides to it:

1) it gets air from only a narrow slit between the bonnet and deflector plate.
2) once you pull it apart you realise its very restrictive!

i might take the resonator box off the side for more roar but i doubt i'll be able to hear it as my exhaust is so loud...95db when held at 5k