Mercury Quicksilver 938-8M0115134 Cylinder Head Assembly 2.5L/3.0L

All new Quicksilver cast iron cylinder head, hardened valve seats press fit into the cylinder head with stainless steel valves featuring seats treated with a cobalt‑chromium alloy for extreme durability. This cylinder head features screw‑in rocker studs. Early design large intake ports require the use of gasket 27‑96429.

1963‑1989 MCM (sterndrive) 2.5L & GM 2.5L
1968‑1989 MCM (sterndrive) 3.0L & GM 3.0L
2.5L GM automotive & Postal engine

Exclusive to Quicksilver are Black‑X Composite valves that are stainless steel valves with seats treated with a cobalt‑chromium alloy and black plasma nitriding. This composition provides extreme durability when using gasoline and compatibility with alcohol and alternative fuels.