Cast iron log style exhaust manifold fits Chrysler LM318, M340, & M360 marine engines from 1966-1972. Chrysler Small Block Exhaust Manifold | Barr Marine CM-1-6672A Barr Chrysler log style exhaust manifold (rounded top) Chrysler exhaust manifold for LM318, M340 and M360 model engines from 1966 to 1972 Interchangable between port and starboard side Supplied with gaskets and mounting hardware For flat top version (1973-1986) use CM-1-6677A Heavy duty cast iron Painted blue Replaces Chrysler 3675826 manifold with rounded top