doorman exhaust manifold flow rates

[metalneverdies]

Do the door man exhaust manifolds have the same flow rates as the factory manifolds?

I need to replace the passengers side manifold and want to make sure it would match the flow of the drivers.

 

[496truck]

Not sure on the flow rates.

But I did replace my pass side manifold with an aftermarket one back in 2009 and have yet to have an issue from it. Still the original GM one on the drivers side. I would think if there is any flow difference between the 2 it is minimal if any at all.

Mine came from one of the vendors here, 1a Auto. Look for a member here named 1aTony.

 

[80' 427]

You are using manifolds, the difference isn't enough to worry about. If you want "HIGH FLOW" manifolds use a Vortec set. They gain a tiny amont on hobby stock engines.