RPM's Rustler rear bumper is designed to protect the rear of the chassis

Anodized a stylish flat black

Custom Made 540 Steel Case

Zero Shock Silver 104mm (4)

LiFe batteries are SAFE

Team Associated - Reedy Sonic 540-M4 Modified Motor 7.5 Driver Edition RC Cars & Trucks 1/24 Scale RPM's Rustler rear bumper isThe 540 M4 Driver Edition is technically identical to the standard 540 M4, but is instead equipped with the ASC27447 rotor, giving the motor an improved throttle feel and greater consistency. Required to Complete: Soldering of motor leads of desired length and thickness. Features: CNC machined lightweight can Aluminum end cap Low resistance, silver plated solder tabs Optimized air cooling Dual precision ball bearings Balanced rotor Performance