These are the optional Hot-Racing Lower 4-Link Mounts for the Axial Yeti Kit and RTR. FEATURES: CNC machined aluminum construction, blue in color Replaces AX31104 stock plastic lower mounts Ideal for high speed bashing and big jumps Thirty day limited warranty beginning at date of purchase- valid in the United States only INCLUDES: Left and Right Lower 4-Link Mounts with Mounting Hardware