Exhaust valve for what Fred ?
I know that the "R" has a valve on the silencers to change the note of the exhaust in Race mode, but on the GTD, all the fake sound trickery is done by the speaker just in front of the rear axle.
If this is a valve of sorts, not just an exhaust sensor, then what does the valve control ? Does it limit flow though the exhaust during warm up or during a regen for example ? Looks a little big for just a sensor doesn't it ?
If you look at the close up below, it looks like it has a metal bellow which suggests it's a solenoid that moves in an out ?
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