High Temperature Resistant Composite Exhaust Gasket 20543071 Anti Deformation For Diesel Truck Product Description This exhaust manifold gasket is a vital sealing component for heavy duty commercial diesel truck engines. Made of multi-layer heat-resistant composite material, it is installed between exhaust manifold and engine cylinder head. It forms a tight seal to block exhaust gas leakage, reduce noise and protect engine performance. It can withstand extreme high temperatur