This is a 6s on 150amp 1900kvcan, 57/16 gear. I have more fun sometimes with this than my 1/8s. Something about this Lil mfer. This thing is stuiped fast and jumps like a big boy lol. Center bar is a wire holder and it takes a Lil of the impact its able to move back in forth. Metal gears F/B center. Got new wing yesterday also has 4s kraton cvds and hub carriers, and modified HR cvds and outdrives.