Intake manifold. Copied Elddebrock performer RPM.

Johnny Mac said

Last time we tested one of those It scrubbed nearly 40 horse off one of our BPC4085CTC engines. Take that for what it's worth. We will only use the edelbrocks.

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Was it down a lot throughout the RPM range or mostly near peak power RPM?

I like that you all chose to keep the extra power on your crate engines instead of using the cheaper intake that is down power.