This replacement cylinder head is specifically designed for Mercruiser-Volvo Penta 4.3L V6 Vortec engines with an 8 bolt intake.Vortec Design 8 Bolt Intake, Replaces Casting # 12557113 – ASSEMBLED. Made from the highest grade cast iron.

 Assembled heads include:

• 100% New OE type valves, seals, valve springs, and retainers (OHC assemblies do not include cam & lifters)

All cylinder heads outperform their competitors!

• Thicker deck for greater strength

• Improved design resists cracking

• Superior port finish for increased flow

• Water flow redesigned for greater thermal conductivity

• Hardened exhaust seats

• CNC machined guides and seats

• 25-point quality check on every head

• 3-angle valve finish

• Competitive pricing

• Casting / OEM:

  • 12557113

  Make your engine run smoothly again with this high-quality replacement cylinder head.

* Cylinder Heads are sold each