no, you don't need to use the oem rebranded version of draw-tite's econo hitch package... you can use anything that is rated properly for what you are towing...

ie: get the ball and tongue that has the capacity for at least 6000 lbs (or greater in my case). also, make sure you the ball is the correct size for your trailer... i use the Equal-I-Zer load distributed anti-sway hitch system with 10,000 lb 2 5/16" ball and 10,000 lb sway arms