Originally Posted by John_01
I wanted to ask if your Euro performance muffler includes a pneumatically operated valve on one of the exhaust outlets. I think such a system is used on the 330i in UK and Europe, but is not used on our 325i's as delivered to Australia.
You are correct, my muffler did come with the pneumatic valve on one of the pipes but serves no purpose on our cars. The default position is open so it causes no real dramas.
I'm not sure but perhaps the E90 330i that you could get from about 2005-2007 would utilise it.