I'm in the process of making my own duels and I'm wondering how big the exit should be going from each half. The different things I've read says 1.625 40 inches long for headers. But I'm running 3 into 1 so should I go alittle larger say 1.75 or 2.0?

The outlet size on the factory manifold and on Dutra Duals is 2 inch.
DD

I have a set of the clifford duals if you tell me what you are looking for I will get the sepcs the best I can, they are off the car right now so it will be easy

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225+0.080 at 10:1
268cam
holley 390
clifford headers
8 3/4 355's lsd
kh brakes
electronic ing

Clifford duals use 2.5" collectors. V8 headers usually use 3" collectors.

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