KVR mounts are made of lightweight, TIG welded, yellow zinc plated, 4130 chromoly. The mounts have more clamping surface on the frame to help hold the mount in place. The clamps also feature machined out pockets, saving about a pound compared to other steel mounts. All engine mounts have a 90 day warranty against breakage, this does not include damage caused by misuse or abuse. Weight: 4_lb 10_oz (2.1_Kg)