I have one, makes a solid PEAK 40 hp over stock....the advertized 65 HP is a gain at peak torque, so at about 1900 RPM. This is on a 2001 VP44 truck. (common rail versions are much different)
It's stacked with an old 3 wire Competiton Blue Box, Mach 6+ injectors, twin turbos...yadda yadda yadda...truck makes 635 ponies at the wheels
Edge EZ on it's own on a bone stock VP44 cummins should not need a pyro.