[Bibio]

as title says, on chewy's web site..

anybody tried it on a k7-k8?

the blurb:
The pair system feeds air into the exhaust to aid in the combustion of unused fuel. The system was designed to improved emissions. The problem it causes is when using race cans or many aftermarket cans you can get a lot of popping through the exhaust and occasional backfire through the air box. The elimination of the system will fix this problem, and also saves weight. One way is to plug where the valve draws air from in the air box and leave the rest of the system in place, but this kit will allow you to remove the full system and save several pounds of useless weight.

worth a laugh at £30