XRAY Active Dif segments are CNC-machined from extremely tough metal, and possess extremely precisely-machined 'V' ramp grooves with 120° angle for simple disengagement adjustment. The section is hardened to ensure endurance and durability. The sections are laser engraved with '120°' for effortless and immediate recognition. Set of 2. The 120° portions give more instant reaction both on- and off-power. On-power the diff becomes quite difficult immediately (no wait); off-power the diff becomes free immediately (no delay). For use on high traction songs. Active Differential Segments can be purchased in three different alternatives: #352123 - 60° #352125 - 90° #352127 - 120° Active Differential Segments fit: #325100 - Active Differential for XB2/XT2/SCX #365100 - Active Differential for XB4/XT4 Font/Rear #365101 - Active Differential for XB4/XT4 Center