Quote:
Originally Posted by heinzena
If you guys want to modify the sound of your exhaust, without adding MPPK here is how to do it -- I did it on my 340i and it sounds pretty darn good. The system described below appears to be the same on the new X5:
There is a valve on the right exhaust. This is usually closed, until the engine gets above ~4000 rpm, then it opens. This valve is controlled by a servo motor. To see it you'll have to crawl under the right exhaust (don't do this right after driving, its hot!). You'll see a wire plugged into it. Put your car in park, put the car in sport mode and hit the gas hard. This will open the valve. If you shine a flashlight in there, you will see it open (the flap runs parallel to the exhaust pipe). Now, before it gets too hot, get back underneath the right exhaust and unplug the wire from the servo. Now the valve is permanently open. I then wrapped the exposed wire and the socket on the servo (kind of looks like a USB) in plastic and electrical tape to prevent it from getting wet, and taped it too the body so it didn't dangle below. A little ghetto, I know, but it sounds great and cost nothing. Has a nice growl and lots of pretty over-run burbles.
I'm assuming this will work with the X5 as well, as all the same components are there, and I plan on doing it when I receive my week 49 build.
If someone tries this, please post your results!
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I previously had a muffler delete on the g05 which was unbearably loud for me so I reinstalled it. Either way, I had a muffler delete and the valve open mod. Recently, I decided to do the valve open mod again. Both times, I just unplugged the wire going to the valve when the car was off. I'm not quite sure why some say it's not the case for them, but to make sure I've tried this 5 times so far and all 5 times for me, regardless of engine being cold or warm, the valve is open by default when the car is off. For those that are trying to see if ur valve is open or not, u can easily tell since you would easily be able to feel the exhaust coming out of the right pipe.