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SIERRA High Performance Cylinder Head

Model # 13476841Mfg # 18-4503


Customer Reviews
Delivery within 2 - 3 weeks.

Product Description

  • Up to 60 HP increase over OE cylinder heads
  • 185cc intake runner/ 62cc exhaust runner
  • 72cc combustion chambers
  • 2.02 intake/1.60 exhaust stainless steel valves
  • 5 angle valve seat cut
  • Double drilled intake mounting for either standard 12 bolt GM intake or late  model 8 bolt Vortec intake
  • Accepts both perimeter or center bolt valve covers
  • Fits 5.7 & 6.2L small block GM V-8 applications
  • Cast Iron
  • Corrosion resistance heavy-duty cast iron castings suitable for saltwater usage

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