I bought a modified .25 6 port from Rick Brake at RB MODS that is an incredible engine. I have always run NovaRossi engines with excellent results. After speaking with Rick I decided to give the GO-Tech a try. This motor makes the best useable power that I have seen in several years and is very easy on fuel consumption. And the price was half of what a NovaRossi would have set me back. If you are looking for a great engine for your 1/8 scale giv e Rick a call. See rbmods.net