yes the mamba does have the drag break feature and thats what im running in both of electric , im playing with the T4 right now, i started to play with the mamba tonight on the couch just to get the dragbrake into the ballpark and its a good thing i did , the diff was making a horrible sound that apparently i didnt hear sunday over the other 9 trucks on the track lol. So needless to say i rebuilt a diff tonight instead of getting to far with the brakes.Luckily i had the parts on hand because our ponits series starts thursday night.Thanks for the info on the 3pk i looked everywhere through the manual and the menu on the controller for anything to do with dragbrake.