Magnum RHS Heads horsepower gain??

AdamR said

Whats your goal with the car ? LXGuys Dart is running 11s with a pretty mild 360 Magnum. He has EQ heads a small cam and a RPM Air Gap

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Street car, I'm hoping for 11.90's thru the mufflers with a 150 shot of gas. I'm thinking that after drag/friction that I will have 425 hp or so at the wheels