Exhaust passage for an internal combustion engine

摘要

An engine part with a cast main body and a manifold type ceramic liner which is cast in the main body to define a manifold type exhaust passage therein, the ceramic liner including a hollow cylindrical liner body and a plurality of cylinder members branched from the liner body, a through portion being provided at a branched area of the ceramic liner for communicating inside and outside of the ceramic liner at which area adjacent cylinder members are branched apart, the through portion being filled with a molten metal at the time of casting the main body.