Anybody know

[urquattro-island]

or have a link to the site, that has a trhottle body as a 3" exhaust, just before catalyst, that opens on boost pressure?? Know what i mean??

[Animal Mother]

or have a link to the site, that has a trhottle body as a 3" exhaust, just before catalyst, that opens on boost pressure?? Know what i mean??

An exhaust butterfly valve.

Like THIS?

Trucks have used these things for ages now. HERE are some "off the shelf" units.

[urquattro-island]

ok

thanks but there was a video with a golf gti, if i remember right.

[raymor]

this one from ATP

http://www.atpturbo.com/root/releases/release091004.htm

[S2central.net]

COuld be nice - on a scream pipe attached to WG for example

[a4kquattro]

Got one on my v8 twin turbo coupe. It works well

[urquattro-island]

this

is pretty cool