ISR Performance Transmission Mount - Nissan 240sx ISR Performance Transmission Mounts are made of Poly-Urethane to help with transmition feel and to stiffen up the drive train to support better power transfer to the rear wheels. These mounts are a essential upgrade to any swap or when replaceing damaged factory mounts, they also pair great with our ISR Performance Adjustable Engine Mount Set ** All ISR Performance Products are Designed for Off Road Use Only **