Has anyone used these exhaust cutouts? If so are they any good?

[img}http://www.jegs.com/photos/55530750.jpg[/img}

I have used these with an electric cutout and they are good quality, didn't leak and are easy to install.

Looks like the Flowtechs I have on both of my cars. So far I've had no problems with them. I have an electric cutout plate on the Camaro and a set of dual electric plates for the El.

a friend of mine has electric cutouts on his 72 polara, and he loves'em