Onservation about magnum 5.9

Vid in post 5 verifies 300 GROSS HP with headers from stock 5.9 (rated 245 NET HP from factory).

Did they say what headers they were for 20 HP gain over the Mag manifolds?

EDIT- 288 HP with manifolds. Headers only gained 12 HP. Interesting.
Seems to verify those manifolds are pretty good. I wonder if they were the 1992 only "big pipe" version.

EDIT 2- small manifolds.That supports the theory that those big pipe versions are "just as good" as headers.
291 HP on the "crate" version with a dual plane and a 750 carb. IMO 3 HP difference is negligible.