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#1
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Question on the X3 tailpipe..
I checked my Z4 and it doesn't have that valve.
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Present - 2006 X3 Present - 2003 Z4 Past - 2001 740il Past - 2001 R1150RT Past - 2000 Volvo S80 |
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#2
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It opens at high power for better performance.
Cheers |
#3
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It regulates exhaust back-pressure for better engine efficiency throughout the rpm range. A certain amount of back-pressure is desireable to help keep the incoming fuel charge from being sucked out the exhaust during the overlap period between the intake and exhaust valves. As rpm's increase it opens to allow the larger amount of exhaust gasses to pass more freely.
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'05 X3 3.0i Alpine White/Gray Leather/Alum. Trim Sport/Steptronic/Servotronic/Panoramic Prem. Sound/Staggered 18" Style 114 Y-Spokes Last edited by Ishniknork; 09-20-2006 at 10:05 PM. |
#4
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I don't think mine has this.
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#6
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Sport Package does not have it just in case your looking for it.
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Rick in Prescott AZ 06/X3 Silver gray / Step / Prem / Sport BMWCCA Member 162285 www.livesafeandhealthy.net |
#7
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Does the Sports Package use a different exhaust?
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- Mike - 2006 X3 Saphire Black / Grey Interior |
#8
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Not sure about the whole exhaust but the finale muffler / tailpipes seem to be different. The diameter of the tips are different then the non-sport as well as the sport has stainless tips, non sports do not and the sport does not have the flapper valve
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Rick in Prescott AZ 06/X3 Silver gray / Step / Prem / Sport BMWCCA Member 162285 www.livesafeandhealthy.net |
#9
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Here's a picture of the valve.
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Present - 2006 X3 Present - 2003 Z4 Past - 2001 740il Past - 2001 R1150RT Past - 2000 Volvo S80 |
#10
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JB & AB |
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