Yeah O.S makes a .26 4 stroke and a lot is known about them. But most do not use 4 strokes though in our rc's, cause it takes more then twice the size of a 4 stroke to equal that of a 4 stroke in our rc engines. so that .26 powered engine makes about the same power output of a semi good .12 a good high quality .12 wil have more Hp then that of the .26 4 stroke. Now it will have more torque then the .12 but I dont think that it will do a whole lot for it though.