Or, if you just want a cut out you can simply buy one on eBay and put it in the exhaust pipe wherever but just before your backbox would likely be best noise wise!! Then you can buy the box you want and with the flick of a switch go crazy for as long as you can take it!! Used a lot in drag racers that mostly see street use. JIM
So I've been looking into getting this and finding a quality producer.
Digging around the Internet and it appears that for road cars there are some issues to overcome. Fitment is not the issue.
The issue is with rattling/poor sealing when closed and seizing of the moving parts.
Some suggest the valve needs to come out during winter months to prevent corrosion.
Over in the U.S where this is popular there seems to be real mixed views on these..
But disappointed really as would like it in all year. Don't really want to spend on something that just ends up being a pain.
Will keep searching for a reliable one of it exists...