ecut question

i was doin some research on what kind of exhaust i should run for my project and i came across something about an ecut that allows you to run opendownpipe when you want…what exactly is this and does anyone have a pic of it…i did some searching but i came up empty handed on the subject…any info would be appreciated…by the way im gonna be running the rsr exmag…picking it up this weekend!

http://www.mccordcg.com/mpp/mpp.htm
http://www.dmhperformance.com/
http://www.quicktimeperformance.com/qtec.htm

so when the butterfly is closed the gasses go through your muffler and when its open they take the shortest path which would be through the butterfly and into the atmosphere

^^^yesh…
here’s my setup…mccord

thats sweet…and not bad for 110+shipping and a little while welding it onto a piece of piping to go where my cat is now…def. something i will look into when i get further into my project