Small Block Exhaust Elbow Gasket | Chrysler 2847480 Gasket seals between exhaust manifold & exhaust elbow on Chrysler LM318, M340, & M360 marine engines with log style manifolds. Chrysler log style exhaust elbow gasket For Chrysler LM318, M340, and M360 engines with log style manifolds from 1968-1985 Replaces Chrysler 2469559