J Concepts JCO8139

J Concepts JCO8139 RM2 MBx8-T Carbon Fiber Drivetrain Rock Guard

Regular price
Sale price
Regular price
Sold out
Unit price
Shipping calculated at checkout.

JConcepts together with Ryan Maifield and ace mechanic Mike Truhe had a goal before the ROAR Fuel Nationals of creating a rock guard capable of resisting larger debris from getting into the drivetrain on the MBX8-T line of vehicles. An ultra-thin carbon fiber plate has been created to position over the rear driveshaft and diff outdrive to block items from entering from the top of the vehicle.

Steady input from the team help create products and eliminate on-track concerns or new ways to maintain consistency on the racetrack. Results have been impressive with Ryan Maifield already winning such races as The Dirt Nitro Challenge with the new guards.


  • Genuine carbon fiber material
  • Specially designed around chassis components
  • Included hardware for assembly
  • Proven racing performance