Hi, Guest
08-18-2014, 10:52 PM
Think of it this way - you don't really have a dual exhaust - what you have is two single exhausts, only one of which is used at any given time, depending on the position of the valve.
With the valve closed, the exhaust is routed through the side with the muffler - and so the sound is, well, muffled and therefore quiet.
With the valve open, the exhaust is routed through the side without the muffler, and therefore is louder.
With the valve closed, the exhaust is routed through the side with the muffler - and so the sound is, well, muffled and therefore quiet.
With the valve open, the exhaust is routed through the side without the muffler, and therefore is louder.
2008 Fusion SEL MTX - DD1 * 2009 Fusion SEL - DD2 * 2007 Focus ZXW - R*I*P * 2004 Focus ZTW CD Silver - sold * 2004 Focus ZTW Black - sold * 2003 Focus ZTW Black - sold * 2001 Focus ZTW Gold - sold * 2000 Focus SE Wagon (ZTW option) - Black - sold * 2000 Focus SE Wagon (ZTW option) - Gold R*I*P
2003 Focus ZX5 infra-red Track Rat - R*I*P
2003 ZX5 CD Silver Track Rat - retired, but still in the driveway
New track rat: 2000 ZX3, Atlantic Blue * JRSC with lots more to come
* New Zetec crate motor - NFG - thanks Topspeed *
2003 Focus ZX5 infra-red Track Rat - R*I*P
2003 ZX5 CD Silver Track Rat - retired, but still in the driveway
New track rat: 2000 ZX3, Atlantic Blue * JRSC with lots more to come
* New Zetec crate motor - NFG - thanks Topspeed *