This is the Serpent SDX4 Roll Center Spacer. This 2mm coated aluminum spacer fits below the differential and slots/keys into the chassis. You can also put 2 on top of each other to create a 4mm spacer. The design is made in such a way that the 2 spacers will also lock in position. Depending on the plates you use, you may need to also space out the rear stiffener.
Increasing the rollcenter will move the differential higher as well, creating more grip and steering, but less easy to drive.
This product was added to our catalog on May 8, 2017