redcat Volcano epx engine swap

Hi, I have a redcat volcano epx (2017 model) here is the link to it : https://www.amazon.com/Redcat-Racin...EP8YN4/ref=pd_bxgy_21_2/141-1373819-4650634?_
and I'm not very satisfied with the torque it delivers and I was wondering what brushed (maybe brushless If I don't have to get new parts/batteries) so what motor could I put in it that'd give it the extra torque (maybe extra speed but I don't care if it's a few mph slower) and not have to replace any parts on it cause I'm on a budget I am hoping to speed 30-40$