This is a rear end conversion kit for the HPI baja. Includes everything in the photo.  Extended axles, upper and lower rear arms, pins and bushings.  Perfect for the RCMAX Hybrid chassis or your do it yourself Hybrid.   
Machined from billet 6061 aluminum
Arms have been extended 1.00" per side 2.00" oal
Includes all necessary parts for rear conversion
Greatly enhances handling
rebuildable bushings and driveshaft pins
Lifetime warranty