Free Exhaust Mod.

[MysticBlueX3]

Here is a free exhaust mod for those that wish their X3 had a sportier sound. I think this only works for 04-05 models. If you look at your exhaust, the right pipe has a butterfly valve that closes at low rpms. There is a rubber hose that controls that. At low rpm that hose acts like a vacuum which closes the valve. You can remove the hose which will allow the right pipe to stay open all the time giving your exhaust more of a sportier sound at low rpms. If you don't like the way it sound, you can just hook the hose back up. I'm planning on sticking a golf tee in the hose so it won't suck up and dust but you can plug it up w/ whatever you want. O yeah, there was no loss of power in the low rpms and no lights came up when I un-did the hose. Have fun!