Had a Steeda sri on my Kona. Not much on the low end but it really helped above 3500 rpm. My zx5 is till stock for now but I will be making a custom cai with 3"+ pipe decreasing in size to 2.5" which is stock size of AEM part from maf to throttle body. This will help to increase flow and velocity. Intake will also be wrapped to reduce heat transfer from engine.
Hatch Nation #9
"2 by 2 Hands of Blue."