原帖由 <i>严守壹</i> 于 11-10-22 15:10 发表 <a href="//www.xcar.com.cn/bbs/redirect.php?goto=findpost&pid=339972898&ptid=15845046" target="_blank"><img src="//www.xcar.com.cn/bbs/images/common/back.gif" border="0" onload="if(this.width>760) {this.resized=true; this.width=760; this.alt='Click here to open new window';}" onmouseover="if(this.width>760) {this.resized=true; this.width=760; this.style.cursor='hand'; this.alt='Click here to open new window';}" onclick="if(!this.resized) {return true;} else {window.open('//www.xcar.com.cn/bbs/images/common/back.gif');}" onmousewheel="return imgzoom(this);" alt="" /></a><br />
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浅显解释一下:宝马双边单出排气系统(只限大排量发动机),为了保证低速时的尾鼓回压(有利于低扭的增加),在尾鼓内有一个电控的单向阀门,所以,经常市区行车的,基本上大部分排气都从左边的尾管排出。<br />
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