Yup, real good stuff, trust me. I love mine. People have been blown away with how much power it makes. And with 10% nitro to boot. I live above 3500 ft, so it does not bother the engine. At a lower altitude 5% would be just fine. The engines (unless they changed them in the last year or so) are actually designed to run on FAI (0% nitro) fuel. They are powerful, but run so on low nitro fuel. Something to consider with the price of nitro. Good luck with whichever engine you get.

Mark Shuman

BTW: MVVS engines are built like a tank. Very robust to say the least. They will take a good lickin and keep on tickin.