whats that pipe or Y pipe that you connect to the end of your headers and you can either run straight headers or exhaust by using a switch? u can block off the hole to make it straight headers and it will allow the air to flow out the exhaust or u can block the hole that goes through the exhaust and let the ait flow straight out of the headers. i seen this somewhere and i was wondering whats it called or where can i find it...?

 

exhaust cut out. ebay has them or most anywhere u search for one .