I spoke with Tobi(sp?) at Team Losi and he told me that it is a completely re-made .26. They have ported it completely different, new crankcase, new crankshaft, new rods, new piston and sleeve, and a new head. It's carbed different too. It's completely redone to make it flow better. He said it is a lot more powerful than the M26. Almost comparable to the M28.