hyper 7

Hello everyone I'm looking to upgrade my hyper7 to 2 speed! Which vehicle should i look for parts from that should fit? anyone experienced in this upgrade?

Hi I'm really struggling with getting my hyper 7. 28 running nice so I can take it for a rip up. I brought the car off Facebook from a guy who seems genuine told me about the car and wat he used to do with it ( ex racetuned engine) so the engine is race tuned and set up for racing so as sokn as...