alright, main reason that im buying the 7port is so that when racing on other tracks that have more flow to them than, technikel it ll have that extra power, im useing it mostly as a spare, and as a main engine for short technikel tracks i have bought a OS V-spec with the OS 2060 exhaust made for it, alright well ill take your word on the 2047 HN for the GO Tech and use that for the 7port 5port which ever i end up getting.

thanks.