I've seen these all over for V8's, I talked to a dude with a ford coupe and has an exhaust dump valve, where makes it so he can run exhaust, or straight header for drag.

I have also seen it a LONG time ago on eBay for an exhaust dump valve where you can run cat back exhaust, and when you race, you flip a valve that you install by your hood release latch, and then ur running open header

has anyone ever seen this and know where to get one? I am wanting to find and purchase one of these and I KNOW they are out there grrr

can't find anymore on ebay damnit.

tia

 

Make your own. Use a TB from a junk yard car. The butterflies on TB's are the best sealing ones you can find.