Most horsepower numbers are false. I would go off of on track performance. Most of the modified engines out now are so close in power that it comes down To gearing and tuning. The fastest motors I have seen were xxl3 balanced,Murnan rbm3, Murnan 353,jp to3-t&jp eagle tl3-t, Murnan +12sct. I will Admit os has stepped there game up new .12 engines and .21 engines are fast as hell for the price. Just pick one of these motors and you won't lack any power.