The Avid Xray XB2 24/25 -2° C Arm Mount was first innovated by us for the B6.3 and has turned into a must-have if you are racing on high bite surfaces such as carpet or turf. This mount frees up the vehicle in the turns and when landing jumps sideways such as corner tabletops. Typically, to get to the low rear toe settings that you need on carpet, you have to start narrowing the pills through the D Mount which is increasing side bite by decreasing your trackwidth. Our C Arm mount prevents that from happening by widening the C pivot block, thus starting you at 1 deg of rear toe with centered pills on the C and D mount instead of 3. You will be amazed at how well your car handles with less rear toe when done in the correct fashion.