older dyno charts of Performer RPM vs Ported stock intake

[Mudsport96]

Found this while looking around for Cam info. It is older but still is relevant for people looking for evidence that Iron intakes can be as good as aftermarket pieces.

https://www.chevelles.com/threads/stock-iron-intake-vs-performer-rpm-dyno-and-et.821321/#post-8178009

Starts out with the "marine" intake, then performer rpm, then finally a ported factory iron intake. Good info in my opinion.