Tamiya Radio Control TRF420X CHASSIS KIT no motor/ESCTamiya's R C designers never rest. They are always looking to bring our most hardcore racing fans the very best features that are able to be squeezed into a touring car chassis! Say hello to the TRF420X. The highest end touring car chassis we make, just got better! Key Updates and retained features: The drivetrain features the spur gear positioned toward the chassis center for stable drivability (The motor position is not changed from the TRF420.)