[Gach]

D-ports will never make power of a round port. My headers are coated and are 28 years old, never rusted. The flanges are separated never any header leaks. D-ports are ok, if you want to use stock manifolds for a nice street cruiser.

[Formulajones]

I prefer the round ports but there are a few things that might dictate a Dport in certain situations as already mentioned.

Headers are not a big deal to me so that's not even factored in the decision making. Round ports are certainly much easier in that regard anyway and I've run headers for decades on many cars, including daily drivers without a single issue using them.

The choice would really just depend on what I'm trying to do with the car.

[slowbird]

Originally Posted by Gach

D-ports will never make power of a round port. My headers are coated and are 28 years old, never rusted. The flanges are separated never any header leaks. D-ports are ok, if you want to use stock manifolds for a nice street cruiser.

You have to drive it for the headers to rust.