looks to be a very good build for some streetfun with lots of torque down low and good power upstairs

something that just hit me on how flat the power goes at 5500-6000 could it be one of these two reasons
1.running out of air basicly from ports not flowing anymore?

2.some kind of instability in the valvetrain?

not a profesional just checking if what litle i may have picked up over the years could be the right thoughts