Exhaust Valve on 550
01-26-2009, 07:56 AM
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I was having a hell of a time trying to get the colored fillers on the rear bumper out so I could put in the reflectors so I climbed under the rear of the car and I notcied that there is a valve on one of the muffler tailpipes. I've got the same set up on my Corvette Z06. When the valves opens up it gets significantly louder. On the BMW I haven't noticed the exhaust getting any louder, just the associated engine noises getting louder when you nail the gas.
Is this a performance item? Can the valve be opened manually? Does it make any difference in the exhaust sound?
Is this a performance item? Can the valve be opened manually? Does it make any difference in the exhaust sound?
01-26-2009, 08:31 AM
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My Ride: BMW 545iA Black Sapphire
Model Year: 2005
Engine: 545i
Originally Posted by Thatmarkguy' post='777598' date='Jan 26 2009, 05:56 PM
I was having a hell of a time trying to get the colored fillers on the rear bumper out so I could put in the reflectors so I climbed under the rear of the car and I notcied that there is a valve on one of the muffler tailpipes. I've got the same set up on my Corvette Z06. When the valves opens up it gets significantly louder. On the BMW I haven't noticed the exhaust getting any louder, just the associated engine noises getting louder when you nail the gas.
Is this a performance item?
noise abatement.
Can the valve be opened manually?
yes
Does it make any difference in the exhaust sound?
yes
Is this a performance item?
noise abatement.
Can the valve be opened manually?
yes
Does it make any difference in the exhaust sound?
yes
01-26-2009, 09:55 AM
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My Ride: 2006 550i w/ sport package: bone stock :(
2006 Yamaha R-6exy Raven: Fully Loaded Track weapon
2004 Ducati 749 Testaretta: Fully Loaded
two other family cars that I dont care to mention, lol!
How do you keep it open manually?
01-26-2009, 02:28 PM
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Andy545 you state that there is a sound difference - is it a more "racey" or performance sounding? Like if you kept the valve open you wouldn't want to get a performance sounding exhaust? Or does it make a droning sound at low rpms like the Vette at about 1800 rpm?
01-27-2009, 09:55 AM
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My Ride: BMW 545iA Black Sapphire
Model Year: 2005
Engine: 545i
Originally Posted by Thatmarkguy' post='777918' date='Jan 27 2009, 12:28 AM
Andy545 you state that there is a sound difference - is it a more "racey" or performance sounding? Like if you kept the valve open you wouldn't want to get a performance sounding exhaust? Or does it make a droning sound at low rpms like the Vette at about 1800 rpm?
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