Sounds like a Gen 5 R 25 6 P. Top engine man ! they rip !

Actually funny you should mention about the Mod .25's and .28's .. we are re working a series of them . The factory have been refining the engine and case materials. We did have a few mis haps with these engines about a year ago, we have been extensively testing them as you can see in the vid. .. they have been sorted and man are they going off !

heres a bit of a taste of one of the .28's MM Modified ..


http://www.youtube.com/watch?v=KPhDyAfWi-4