Torque Solution Side Mount Inserts & Billet Front Engine Mount ComboMount Inserts Torque Solution polyurethane engine mount inserts replace the inner rubber material of the OEM engine mounts. Made from 75a durometer polyurethane. Each mount includes 2 half's and a center steel sleeve. These give you improved traction and reduced wheel hop without to much vibration. Bushings come with a Limited Lifetime Warranty through Torque Solution. Fits both drivers side and passenger side. (2 kits needed to do both sides.) Billet