Switchable exhaust valves, any experiences?

[Butter Face]

Just looking for some advice on fitting a variable exhaust system.

I need to get a 3 inch exhaust system fitted to release a bit more power from my car, but I don't want an unsociable sounding exhaust on my rattly old Japanese hatchback.

I have seen these exhaust valves that fit on as part of a custom exhaust system that diverts gas flow depending on if the valve is open/closed like this.



My understanding is that you have a large box on the side with the valve so that when it opens the gas goes through the box and keeps the noise down, but flick the switch and it closes and diverts down a straight pipe for more noiizzeee.

If anyone has fitted one or seen one I would appreciated any input!

Cheers

[Butter Face]

Cheers for the link, had a read and that gives a great cheap link but no info on how they fit/work on a custom system?

I assume they don't just block the exhaust? You need to divert the gas somewhere?

[Butter Face]

Cheers mate, that's incredibly helpful, I'm running a Supercharged K20 with KPro so the output can be used from that.

[Butter Face]

Cheers again.

That setup looks very similar to a lot of the valves you can buy on eBay that are electrically controlled rather than a vacumn so I may look at one of those. That bypass pipe is a great idea though.

[Butter Face]

Thanks for the info mate, have you a part number or fitment info for the exhaust valve?