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I had a 3inch varex mid muffler with a rear cannon. It was quieter closed but it wasn't enough to pass a DB test which are very strict. Still needed a silencer as well. So they do work but they are also not magic. -
Ah ok, I called a while back and they told me that. From memory I couldn't see anything in the PDS but I called just to ask questions. -
Plenty of modern cars run things like Varex exhausts, from HSV through to Ferrari. Their systems are usually setup so once you meet a certain condition (RPM seems to be the main kickover on the HSV from my experience) they automatically open. You could do the same some aftermarket ECU, IE, above X throttle, and X rpm, open the valve, otherwise shut, and then also have a switch to override it when you want a nice exhaust. On my boss' HSV Senator, I pulled the fuse on the variable exhaust, and that fails it into the permanently open position. He loved it, and was the exact amount of idle noise etc that he wanted from it, but didn't want to buy an exhaust for it incase it was droney or shit sounding. -
I still haven't gotten around to fixing mine. Now the blend actuator has broken AGAIN. Twice in 20 years. tsk tsk. -
I've not had issues with this for Shannons. It has been many years since I had a Skyline insured, but had things like the XR6T, and Subaru Liberty GTB. The most restrictive I've had is that it couldn't be parked on the road.
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