Stop in for a cup of coffee

I predict you try 1/2 dozen til you find the sound you like. I have old school 2 chamber flowmasters on my big block dart cause its a sound I like. I have dynaflow max on my small block cuda cause its reserved til I hit it. You are going to be moving a lot of air. It looked like the hp was still climbing when he shut it off. What did Sean build the max rpm to be?