I am actually amazed that people haven't learned by now that going to a dual intake is NOT going to add all that much.
H/P costs thats all there is to it.
back when I was in high school all the header companies said adding headers wou;ld give you a 20% H/P gain.
It was wrong then it is wrong now.
Plus when is this guy going to run out of photos of his things to fill up forum space?