It is a Duratrax Maximum ST Pro. It could date all the way back to 1998. I had the ST with the torq 12, mine was a 1999 i believe. Got it from my cousin in 2006 with the origional piston and sleeve believe it or not and it still ran (with major blow-by of course) Good little trucks but beware of the chassi flex. They are known for that and on big jumps you will notice that your replacing spur gears alot more often. Seeing that makes me wish I wouldn't have sold mine but I gotta say I love my Savvy.