This is a scale underguard option that bolts directly onto Baja Hammer Rey! These come in two options, a single flap, or dual flap.  These are designed in very soft TPU to flex, and withstand damage. The intention behind these are to protect the driveshaft, rear axle, and trailing arms from rocks being kicked up from the tires.
 
Product comes with your choice of single or dual flap - (1) mounting rod - (2) locking m3 nuts