[Colinevan]

Originally Posted by stefke

Look at the Tamiya USA website.

It basically is a "normal" TRF with all the Tamiya Hopups except the alu steering bridge.

Excellent thanks.

Iv copied and pasted the spes should anyone else wonder what the differences are.

The IFMAR Electric 1/10 Off-Road Car World Championships are held in Japan this year and Team TRF will be there in force with their specially-tuned TRF501X machines. To commemorate this participation, Tamiya is announcing the release of a TRF501X World Championship Edition, featuring many special parts that will be used at this world-class R/C race. These option parts promise to bring out the true potential of this racing buggy.

About the Model
1/10 scale assembly kit R/C model of the TRF501X, with many special option parts added.
Differential has been redesigned to increase performance and durability.
New parts including aluminum caster block, aluminum rear upright, and reinforced upper arm mounts further enhance the buggy's ability to withstand the rigors of off-road racing.
New ball connectors made from high-strength steel.
New damper pistons made from Delrin, a lightweight and low-friction resin material.
The entire drivetrain has been modified to improve power-transfer efficiency, with parts such as an 18T center pulley, 37T ball diff. pulley, and 369mm drive belts.
Clear polycarbonate body shell has been redesigned for better aerodynamics.