« Last post by Otto_Ing on Today at 12:20:07 AM »
Looking carefully at the graph of before-after horsepower curves it appears that this whatever-it-is increased the output of a 100 hp motor to 108.3, which is an 8.3% increase. Assuming (without much confidence) that it similarly improves the GT's output, using it on a 27 hp GT with no other mods would produce a bit over 29 hp. I'm not impressed.
I think the power commander 5 alone will not achieve more either without further mods.