Yes it will fit. Those motors are alot shorter than a normal motor.They have a bigger rotor. Running 3s is out of the question on these as it will put out way too much power and will destroy a tranny quick. Fine design sells them but probably other places too. Hacker sensorless motors are really high quality but you pay more for them. I have ran hacker 6 turns and they aren't as fast as the lehner 5300 but last forever. Another option is to run a mamba max with the 7700 motor as it's pretty fast. I have ran it on 3s (not recomended) and it's crazy fast.