**Twin Turbo 67 Dart Project**

Mad Dart said

Chris can you explain what you mean. Are you talking about the Inlet size off the header from the Head? Or the actual Exhaust out of the turbo. Mine is 3.25" exhaust out of the turbo. I am running a 3.5" Exhaust all the way out on both turbo's. If I am understanding this correctly than than by those calculations I would need Dual 5.25" Exhaust and there is absolutely no way those would fit where I am running it out now.............Dang that is HUGE!!

From the bottom of the car I could step it up to 5" if need be!

Click to expand...

Sorry Louis, sometimes I get to rambling. I am talking about the actual orifice (thats right I said orifice!) opening out of the exhaust housing of the turbo that makes up the exhaust system. Like my T60s are 2 3/4 and I am using 4 inch tubing. And actually its a little small and should be 4 1/8. Anyways its just theory and I am interested in seeing how it acts on your car. You obviously are running into room problems so it is what it is. If you look at a factory diesel truck it even follows this rule. I thought I would just throw it out there for you to ponder.