Dart's Pro1 Mercury Racing Replacement Head comes standard with an exclusive chromate finish that inhibits corrosion and extends the life of the head in marine applications. Assembled heads also include inconel exhaust valves to withstand the conditions typical of marine performance engines.

Features:
- Premium C355-T61 aerospace aluminum.

- Compatible with Merc 525, 600 and 700 style engines.

- Exclusive chromate treatment prevents corrosion in marine engines.

- Assemblies include inconel exhaust valves.

- Precision cast ports and chambers.

- Multi-angle intake seats.

- Hardened and radiused exhaust seats.

- Bronze valve guides.

- All cylinder heads sold individually.