what does the acoustic valve do?

[04kendalld]

as above i saw a guide on how to remove the valve but what does this do?

 

[Eddie.]

Nothing apart from quieten the engine down to meet EU regs when it left the factory.

AFAIK anyway.

 

[MartinR]

^^^This

 

[04kendalld]

^^^This

so is it louder but in a nice way?

 

[adamlstr]

Got a URL for that guide? The cliotrophy forum one is a 404 error now.

Assume it's just take it out and bung the vacuum hose?

 

[Goodj]

so is it louder but in a nice way?

No, just louder

 

[.Stevo.C.]

Never even noticed any noise difference when I took it off my Trophy.