Hobbywing EZRUN 5687SL 4-Pole 1/5 Scale Sensorless Brushless Motor.  

Specifications:

• Model: 5687SL-1100KV
• Pole: 4
• KV (No-load): 800KV
• Resistance: 0.0041 Ω
• Current (No-load): 4.1 A
• Max Output Power: 5800 W
• Current at the point of M.O.P: 200 A
• Motor Diameter: 56mm 
• Motor Length: 87mm
• Shaft Diameter: 8.0mm
• Shaft Length: 31.0mm
• LiPo Cells: 3-8
• Weight: 916g (42.68oz)
• Applicable: 1/5th RC Vehicles Truck/Dragster
• Suitable ESC: Ezrun MAX5 or MAX6 ESC