Yes, my cousin was using a Titan 550 E-Maxx motor on a 7-cell 3000 pack with the Traxxas XL-1 ESC. It's much faster than you would expect because he changed out his gearing. He can still pull a wheelie off the line, though. I put an E-Maxx motor in my XX-4 with an RRP 16 tooth pinion and a purple spur. It could climb the steps. It sure didn't have much top end. I switched to a Trinity Speed Gems Pro Titanite 15 dbl. with the same gearing and have been racing with that.