Exhaust gaskets 135996780 seal between the exhaust manifold and the head, with high exhaust gas temperatures these high-performance metal gaskets conform for a long reliable life and an effective seal. Always take care when replacing manifold gaskets to remove all traces of sealing material, and prevent particles falling into the manifold or cylinders. Ensure you tighten all bolts or nuts to the correct torque setting, from your machine maintenance manual or contact your local Perkins distributor.