This is a clean canvas for the many different steering setups available for the bullet. Run your servo forward front to back without steering rack or side to side with steering rack.  
 
Bumper only. No hardware or mounting accessories included. As commonly recommended, please use aluminum screws to attach to chassis to protect bumper and chassis in the event of a crash. 
 
To mount servo you will 2 or 4 threaded standoffs, or custom works servo mounts (w/ 4-40 screws)
 
To mount AE flat chassis weights you will need 4 M2 screws. Length depends on how many chassis weights you are using. If you are using more than 1 weight leave 1 weight with threads and drill out the threads of the rest of the weights to at least 2mm or 5/64" diameter.