408 on dyno, what will it make?

gregsdart said
Curve. I am surprised it went over 500 hp with the Airgap dual plane!

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I'm not! The intake is very capable and proven to be so over and over again for many years. I didn't think the Dyno graph would look that good or go 500hp.

Beautiful job! Well done!
Enjoy that sucker Greg!

Did today Dyno it with the smaller headers?