Vti-chris the Go and Hong Nor 2047 pipes are identical as far as powerband, Hong Nor makes the Go pipe for Go but I don't know if the Hong Nor pipe features the 45* pressure nipple as well as the side mount screw for the stinger support.

Genreaper that is definately a pipe issue, on the dyno with the same pipe the go 5port puts out more bottom end and the v-spec pulls it slightly at the top.

Grizz1 that is unusual because the turbo button usually makes the engines run a little cooler. it may have just been difference in weather from the last time you drove, but I am glad your liking the added power, i think the turbo is a must in truggy on the .21's